feat: implement new plugin architecture v2

[hl4b-hal]

This PR implements the new plugin architecture v2 with ZIP-based distribution, hook system, and automated build tooling.

Changes

New Features

Manifest System

• Added manifest/manifest.go - Package for parsing and validating manifest.json files
• Support for plugin metadata, hooks, components, and permissions
• Validation helpers (HasHook, HasComponent, HasPermission)

Extended Plugin Interface

• Added Hooks field to Plugin struct for hook handlers
• Added Permissions field for permission management
• Added HookHandler type: func(ctx context.Context, args map[string]interface{}) error
• Added HookRegistry with:
  • RegisterHook(pluginID, hookName, priority, handler)
  • UnregisterHooks(pluginID)
  • GetHooks(hookName) - returns sorted by priority
  • ExecuteHooks(hookName, args) - executes all handlers

Component Enhancements

• Added Slug field to Component for unique identification
• Added Properties field for configurable component properties
• Added PropertyType constants (String, Int, Bool, List)

Build System

• Added Makefile with targets:
  • make test - Runs all tests (required before build)
  • make build - Compiles and packages plugin
  • make checksum - Generates SHA-256 checksum
  • make sign - Generates GPG signature (optional)
  • make clean - Removes build artifacts

CI/CD

• Added .github/workflows/ci.yml - Runs tests on push/PR
• Added .github/workflows/release.yml - Builds and releases on tag creation
• Both workflows enforce test pass before build

Documentation

• Complete rewrite of README.md with:
  • New plugin creation guide
  • Manifest.json schema reference
  • Hook system documentation
  • Build and verification instructions
  • API reference

Files Added

• manifest/manifest.go - Manifest parsing package
• Makefile - Build automation
• .github/workflows/ci.yml - CI pipeline
• .github/workflows/release.yml - Release pipeline

Files Modified

• components/model.go - Added Slug and Properties fields
• plugins/general.go - Extended Plugin struct, added HookRegistry
• README.md - Comprehensive documentation

Backward Compatibility

This is a breaking change for the plugin architecture. Existing plugins will need to be updated to:

• Add manifest.json to their package
• Export GetPlugins() function
• Use the new Plugin struct format

Testing

All tests must pass before building:

make test  # or `make all` to run tests + build

Verification

Users can verify plugin integrity:

sha256sum -c my-plugin-1.0.0.zip.sha256
gpg --verify my-plugin-1.0.0.zip.asc my-plugin-1.0.0.zip

Related Issues

• Plugin Architecture Enhancement: ZIP-based Distribution with Hook System #2 (this PR implements issue Plugin Architecture Enhancement: ZIP-based Distribution with Hook System #2)

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Contributors: @hl4b-hal

[InvertedBit]

This still needs some work. See that all unit tests pass.
Also, I realized that we need a way for GMS to register and forward specific REST requests to the Plugins/Components.