[CmdPal][AOT] Using ExprTk to make the Cal extension AOT-compatible (#39972)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
This PR replaces the original Mages-based expression evaluation engine
with a WinRT-wrapped version of Exprtk in the CmdPalCalculator module.

### Key Changes
**Expression Engine:**

- All expression parsing and evaluation now use Exprtk (via a WinRT
wrapper) instead of Mages.

**Base Conversion Handling:**

- Since Exprtk does not support non-decimal (binary, octal, hexadecimal)
input natively, added logic to convert all such inputs to decimal before
evaluation.

**Code Structure:**

- The overall logic and API surface remain unchanged except for the
engine and base conversion handling.
- All previous Mages references and dependencies have been removed.

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## PR Checklist

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

<!-- Describe how you validated the behavior. Add automated tests
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## Validation Steps Performed

.github/actions/spell-check/expect.txt

@@ -69,6 +69,7 @@ appwiz
 APSTUDIO
 AQS
 ARandom
+Arash
 ARCHITEW
 ARemapped
 ARPINSTALLLOCATION
@@ -469,6 +470,7 @@ EXPCMDFLAGS
 EXPCMDSTATE
 explr
 exppowertoys
+exprtk
 exptas
 exsb
 exstyle
@@ -1150,6 +1152,7 @@ PARTIALCONFIRMATIONDIALOGTITLE
 PATCOPY
 PATHMUSTEXIST
 PATINVERT
+partow
 PATPAINT
 pbc
 pbi