Add a Touchdown localization pipeline (#15054)

This commit introduces a localization pipeline that submits our
localizable content to Touchdown, the modern localization service we
should have been using the whole time.

The pipeline is scheduled to run after the end of the workday around 6-7
PM Pacific (depending on daylight saving time) if there have been any
code changes on main.

Some of our localizable files were out of spec, so I moved them into the
right places and the right format.

.pipelines/loc/loc.yml

@@ -0,0 +1,52 @@
+trigger: none
+pr: none
+schedules:
+  - cron: "0 3 * * 2-6" # Run at 03:00 UTC Tuesday through Saturday (After the work day in Pacific, Mon-Fri)
+    displayName: "Nightly Localization Build"
+    branches:
+      include:
+        - main
+    always: false # only run if there's code changes!
+
+pool:
+  vmImage: windows-2019
+
+resources:
+  repositories:
+  - repository: self
+    type: git
+    ref: master
+
+steps:
+
+- checkout: self
+  clean: true
+  submodules: false
+  fetchDepth: 1 # Don't need a deep checkout for loc files!
+  persistCredentials: true
+
+- task: MicrosoftTDBuild.tdbuild-task.tdbuild-task.TouchdownBuildTask@1
+  displayName: 'Touchdown Build - 37400, PRODEXT'
+  inputs:
+    teamId: 37400
+    authId: '$(TouchdownApplicationID)'
+    authKey: '$(TouchdownApplicationKey)'
+    resourceFilePath: |
+     **\Resources.resx
+     **\Resource.resx
+     **\Resources.resw
+    outputDirectoryRoot: LocOutput
+    appendRelativeDir: true
+    pseudoSetting: Included
+
+# Saving one of these makes it really easy to inspect the loc output...
+- powershell: 'tar czf LocOutput.tar.gz LocOutput'
+  displayName: 'PowerShell Script'
+
+- task: PublishBuildArtifacts@1
+  displayName: 'Publish Artifact: LocOutput'
+  inputs:
+    PathtoPublish: LocOutput.tar.gz
+    ArtifactName: LocOutput
+
+