add make-generate to pre-commit (#491)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced a new pre-commit hook (`run-make-generate`) to automate the
generation process in application directories.
  
- **Documentation**
- Enhanced readability of the Managed NATS Service README by adjusting
formatting and removing unnecessary headers.

- **Bug Fixes**
- Corrected JSON structure in the Postgres values schema to ensure
validity.

- **Chores**
- Updated pre-commit configuration for improved consistency and
functionality.
- Reorganized properties in the NATS values schema, removing the `users`
property to reflect changes in user management capabilities.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/pre-commit.yml

@@ -17,6 +17,18 @@ jobs:
       - name: Install pre-commit
         run: pip install pre-commit
 
+      - name: Install generate
+        run: |
+          sudo apt update
+          sudo apt install curl -y
+          curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -
+          sudo apt install nodejs -y
+          git clone https://github.com/bitnami/readme-generator-for-helm
+          cd ./readme-generator-for-helm
+          npm install
+          npm install -g pkg
+          pkg . -o /usr/local/bin/readme-generator
+
       - name: Run pre-commit hooks
         run: |
           git fetch origin main || git fetch origin master