Rename workflows to match workflow names (#5866)

## Summary
- rename each GitHub Actions workflow file so its filename matches the
workflow `name` value for easier discovery

------
https://chatgpt.com/codex/tasks/task_e_68dc213f0a808330869ed73c27858eb9

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5866-Rename-workflows-to-match-workflow-names-27e6d73d36508103bca7ea2746f73a3b)
by [Unito](https://www.unito.io)

.github/workflows/vitest-tests.yaml

@@ -0,0 +1,46 @@
+name: Vitest Tests
+
+on:
+  push:
+    branches: [ main, master, dev*, core/*, desktop/* ]
+  pull_request:
+    branches-ignore: [ wip/*, draft/*, temp/* ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v5
+
+    - name: Install pnpm
+      uses: pnpm/action-setup@v4
+      with:
+        version: 10
+
+    - name: Use Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 'lts/*'
+        cache: 'pnpm'
+
+    - name: Cache tool outputs
+      uses: actions/cache@v4
+      with:
+        path: |
+          .cache
+          coverage
+          .vitest-cache
+        key: vitest-cache-${{ runner.os }}-${{ hashFiles('**/pnpm-lock.yaml') }}-${{ hashFiles('src/**/*.{ts,vue,js}', 'vitest.config.*', 'tsconfig.json') }}
+        restore-keys: |
+          vitest-cache-${{ runner.os }}-${{ hashFiles('**/pnpm-lock.yaml') }}-
+          vitest-cache-${{ runner.os }}-
+          test-tools-cache-${{ runner.os }}-
+
+    - name: Install dependencies
+      run: pnpm install --frozen-lockfile
+
+    - name: Run Vitest tests
+      run: |
+        pnpm test:component
+        pnpm test:unit