feat: convert to pnpm monorepo (#1137)

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

- **New Features**
- Introduced enhanced project management scripts for building, testing,
and deploying the monorepo.
- Added an automated testing pipeline for improved reliability of the
Libvirt functionality.
- Provided a new plugin installation script that ensures thorough
cleanup during removal.

- **Improvements**
- Updated container mappings and dependency configurations for more
stable and efficient operations.
- Refined web application settings and build commands for smoother
performance.
- Streamlined continuous integration workflows with optimized caching
and dependency management.
  - Updated allowed origins in configuration for enhanced security.

- **Chores/Refactor**
- Removed outdated configuration files to simplify maintenance and
enhance consistency.
- Enhanced event listener management in the web application for better
error handling.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

plugin/plugins/dynamix.unraid.net.plg

@@ -203,6 +203,9 @@ echo "**********************************\n";
 echo "🧹 CLEANING UP - may take a minute\n";
 echo "**********************************\n";
 
+# Clean up node_modules before package removal
+rm -rf /usr/local/unraid-api/node_modules
+
 if (file_exists("/boot/.git")) {
   if (file_exists("/etc/rc.d/rc.flash_backup")) {
     # stop flash backup service