Testing - Add support for ARM64 architecture (#1149)

- Allow the custom `tcl` vcpkg port to build on Windows ARM64 and map vcpkg architecture to Tcl’s NMAKE build flags.
- Add a `target-arch` input to the composite GitHub Actions used to configure/build OCCT, selecting the correct CMake `-A` architecture and vcpkg triplet.
- Adjust OCCT CMake vcpkg feature list macros to update `VCPKG_MANIFEST_FEATURES` in the current scope.

.github/actions/build-occt/action.yml

@@ -8,6 +8,10 @@ inputs:
   compiler:
     description: 'Compiler (msvc, clang, gcc)'
     required: true
+  target-arch:
+    description: 'Target architecture (x64, arm64)'
+    required: false
+    default: 'x64'
   artifact-name:
     description: 'Name of the artifact to store build results'
     required: true
@@ -47,6 +51,7 @@ runs:
       with:
         platform: ${{ inputs.platform }}
         compiler: ${{ inputs.compiler }}
+        target-arch: ${{ inputs.target-arch }}
         additional-cmake-flags: ${{ inputs.additional-cmake-flags }}
         use-vtk: ${{ inputs.use-vtk }}
         build-use-pch: ${{ inputs.build-use-pch }}