fix: convert cf-kv and excalidraw-libraries from submodules to regular files

- Remove stale cloudflare-worker submodule entry from .gitmodules
- Remove .git dirs from cf-kv and excalidraw-libraries so Git tracks them as regular files
- Fixes 'No url found for submodule path cf-kv' CI error

excalidraw-libraries/.github/workflows/process-libraries.yml

@@ -0,0 +1,25 @@
+name: Process libraries.json
+
+on: pull_request
+
+jobs:
+  item_names:
+    if: github.repository == 'excalidraw/excalidraw-libraries'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          token: ${{ secrets.EXCALIBOT_PAT_WORKFLOWS }}
+          ref: ${{ github.event.pull_request.head.ref }}
+      - name: regenrate-item-names
+        run: node scripts/gen-item-names.mjs
+      - name: Commit changes
+        run: |
+          FILE_CHANGED=$(git diff libraries.json)
+          if [ ! -z "${FILE_CHANGED}" ]; then
+            git config --global user.name 'Excalidraw Bot'
+            git config --global user.email 'bot@excalidraw.com'
+            git add .
+            git commit -am "regenerate itemNames"
+            git push
+          fi

excalidraw-libraries/.github/workflows/validate-libraries.yml

@@ -0,0 +1,17 @@
+name: Validate libraries.json
+
+on: pull_request
+
+jobs:
+  validation:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Node.js 14.x
+        uses: actions/setup-node@v2
+        with:
+          node-version: 14.x
+      - name: Validate libraries.json
+        run: |
+          yarn validate:libraries