chore: Add preferences support to create-theme workflow

.github/ISSUE_TEMPLATE/create-theme.yml

@@ -51,4 +51,15 @@ body:
       label: Readme
       description: The README file for the theme.
     validations:
-      required: true
+      required: true
+  - type: textarea
+    id: preferences
+    attributes:
+      render: json
+      label: Preferences
+      description: The preferences for the theme in JSON format. Leave empty if there are no preferences.
+      placeholder: |
+        {
+          "uc.my-preference.enable-this": "Enable this feature for the theme",
+          "uc.my-preference.show-that": "Show that feature for the theme"
+        }

.github/workflows/create-theme.yml

@@ -46,6 +46,12 @@ jobs:
           contents: ${{ fromJson(steps.issue-parser.outputs.jsonString)['readme'] }}
           path: theme-readme.md
 
+      - name: Write preferences to file
+        uses: "DamianReeves/write-file-action@master"
+        with:
+          contents: ${{ fromJson(steps.issue-parser.outputs.jsonString)['preferences'] }}
+          path: theme-preferences.json
+
       - name: Setup Git
         run: |
           git config --global user.name "github-actions[bot]"