Advanced Paste: AI pasting enhancement (#42374)

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
* Add multiple endpoint support for paste with AI
* Add Local AI support for paste AI
* Advanced AI implementation

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## PR Checklist

- [x] Closes: #32960
- [x] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [x] **Tests:** Added/updated and all pass
- [x] **Localization:** All end-user-facing strings can be localized
- [x] **Dev docs:** Added/updated
- [x] **New binaries:** Added on the required places
- [x] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [x] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [x] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [x] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

### GPO
- [x] Paste with AI should not be available if the original GPO for
paste AI is set to false
   - [x] Paste with AI should be controlled within endpoint granularity
- [x] Advanced Paste UI should disable AI ability if GPO is set to
disable for any llm
### Paste AI
   - [x] Every AI endpoint should work as expected
   - [x] Default prompt should be able to give a reasonable result
   - [x] Local AI should work as expected
### Advanced AI
- [x] Open AI and Azure OPENAI should be able to configure as advanced
AI endpoint
- [x] Advanced AI should be able to pick up functions correctly to do
the transformation and give reasonable result

---------

Signed-off-by: Shawn Yuan <shuaiyuan@microsoft.com>
Signed-off-by: Shuai Yuan <shuai.yuan.zju@gmail.com>
Signed-off-by: Shawn Yuan (from Dev Box) <shuaiyuan@microsoft.com>
Co-authored-by: Leilei Zhang <leilzh@microsoft.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Kai Tao <kaitao@microsoft.com>
Co-authored-by: Kai Tao <69313318+vanzue@users.noreply.github.com>
Co-authored-by: vanzue <vanzue@outlook.com>
Co-authored-by: Gordon Lam (SH) <yeelam@microsoft.com>

src/settings-ui/Settings.UI.Library/PasteAIConfiguration.cs

@@ -0,0 +1,103 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Microsoft.PowerToys.Settings.UI.Library
+{
+    /// <summary>
+    /// Configuration for Paste AI features (custom action transformations like custom prompt processing)
+    /// </summary>
+    public class PasteAIConfiguration : INotifyPropertyChanged
+    {
+        private string _activeProviderId = string.Empty;
+        private ObservableCollection<PasteAIProviderDefinition> _providers = new();
+        private bool _useSharedCredentials = true;
+        private Dictionary<string, AIProviderConfigurationSnapshot> _legacyProviderConfigurations;
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        [JsonPropertyName("active-provider-id")]
+        public string ActiveProviderId
+        {
+            get => _activeProviderId;
+            set => SetProperty(ref _activeProviderId, value ?? string.Empty);
+        }
+
+        [JsonPropertyName("providers")]
+        public ObservableCollection<PasteAIProviderDefinition> Providers
+        {
+            get => _providers;
+            set => SetProperty(ref _providers, value ?? new ObservableCollection<PasteAIProviderDefinition>());
+        }
+
+        [JsonPropertyName("use-shared-credentials")]
+        public bool UseSharedCredentials
+        {
+            get => _useSharedCredentials;
+            set => SetProperty(ref _useSharedCredentials, value);
+        }
+
+        [JsonPropertyName("provider-configurations")]
+        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+        public Dictionary<string, AIProviderConfigurationSnapshot> LegacyProviderConfigurations
+        {
+            get => _legacyProviderConfigurations;
+            set => _legacyProviderConfigurations = value;
+        }
+
+        [JsonIgnore]
+        public PasteAIProviderDefinition ActiveProvider
+        {
+            get
+            {
+                if (_providers is null || _providers.Count == 0)
+                {
+                    return null;
+                }
+
+                if (!string.IsNullOrWhiteSpace(_activeProviderId))
+                {
+                    var match = _providers.FirstOrDefault(provider => string.Equals(provider.Id, _activeProviderId, StringComparison.OrdinalIgnoreCase));
+                    if (match is not null)
+                    {
+                        return match;
+                    }
+                }
+
+                return _providers[0];
+            }
+        }
+
+        [JsonIgnore]
+        public AIServiceType ActiveServiceTypeKind => ActiveProvider?.ServiceTypeKind ?? AIServiceType.OpenAI;
+
+        public override string ToString()
+            => JsonSerializer.Serialize(this);
+
+        protected bool SetProperty<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(field, value))
+            {
+                return false;
+            }
+
+            field = value;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+
+        protected void OnPropertyChanged(string propertyName)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}