feat: integrate Vitest for testing and update workflows

- Added Vitest as a testing framework in package.json and configured test scripts.
- Created new test files for CLI and client functionalities, ensuring comprehensive coverage.
- Updated GitHub Actions workflows to include testing steps and streamlined release process.
- Removed the deprecated onRelease workflow to consolidate CI/CD processes.

.github/workflows/test.yml

@@ -1,22 +1,27 @@
 name: tests
+
 on:
   push:
     branches-ignore: [main]
   workflow_dispatch:
 
 jobs:
-  unit-tests:
+  test:
     strategy:
       matrix:
-        os: ['ubuntu-latest', 'windows-latest']
-        node_version: [lts/-1, lts/*, latest]
+        os: [ubuntu-latest, windows-latest]
+        node_version: [lts/*, latest]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v6
+        with:
+          version: latest
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node_version }}
           cache: pnpm
       - run: pnpm install
       - run: pnpm run build
+      - run: pnpm run test