[Jetcaster]: Rename 'app' module to 'mobile' (#1373)

Rename `app` module to `mobile` for a more descriptive name for the
target form factor.

Author: arriolac

.github/workflows/Jetcaster.yaml

@@ -19,3 +19,4 @@ jobs:
     with:
       name: Jetcaster
       path: Jetcaster
+      module: mobile

.github/workflows/build-sample.yml

@@ -9,6 +9,9 @@ on:
       path:
         required: true
         type: string
+      module:
+        default: "app"
+        type: string
 
 concurrency:
   group: ${{ inputs.name }}-build-${{ github.ref }}
@@ -66,11 +69,11 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: build-outputs
-          path: ${{ inputs.path }}/app/build/outputs
+          path: ${{ inputs.path }}/${{ inputs.module }}/build/outputs
 
       - name: Upload build reports
         if: always()
         uses: actions/upload-artifact@v4
         with:
           name: build-reports
-          path: ${{ inputs.path }}/app/build/reports
+          path: ${{ inputs.path }}/${{ inputs.module }}/build/reports