refactor(build): use env flags to control feature gate

.github/workflows/build-desktop-release.yml

@@ -24,6 +24,16 @@ on:
         type: boolean
         required: true
         default: true
+      enable-file-sync:
+        description: 'Build with file sync support'
+        type: boolean
+        required: true
+        default: false
+      enable-plugins:
+        description: 'Build with plugin system support'
+        type: boolean
+        required: true
+        default: true
   schedule: # Every workday at the 2 P.M. (UTC) we run a scheduled nightly build
     - cron: '0 14 * * MON-FRI'
 
@@ -87,6 +97,12 @@ jobs:
         run: |
           sed -i 's/defonce version ".*"/defonce version "${{ steps.ref.outputs.version }}"/g' src/main/frontend/version.cljs
 
+      - name: Set Build Environment Variables (only when workflow_dispath)
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        run: |
+          echo "ENABLE_FILE_SYNC=${{ github.event.inputs.enable-file-sync }}" >> $GITHUB_ENV
+          echo "ENABLE_PLUGINS=${{ github.event.inputs.enable-plugins }}" >> $GITHUB_ENV
+
       - name: Compile CLJS
         run: yarn install && gulp build && yarn cljs:release-electron