feat: Plugin Hub V1.0

[chsami]

The Microbot plugin management system consists of several key components working together to handle external plugins. Here's a breakdown of how it works:

1. Plugin Storage and Installation:

• Plugins are stored in ~/.runelite/microbot-plugins/ directory
• Installed plugins are tracked in plugins.json
• Each plugin is stored as a JAR file named after its internal name

2. Plugin Installation Process:

- Downloads plugin JAR from the configured URL
- Verifies SHA-256 hash of downloaded JAR
- Saves JAR file to plugins directory
- Updates plugins.json with new plugin
- Triggers plugin loading

3. Plugin Loading System:

- Uses custom MicrobotPluginClassLoader to load plugin JARs
- Scans for classes with @PluginDescriptor annotation
- Builds dependency graph of plugins
- Topologically sorts plugins to load them in correct order
- Instantiates plugins using Guice dependency injection

4. Plugin Hub Integration:

- Connects to external plugin hub (https://chsami.github.io/Microbot-Hub/)
- Downloads plugin manifests containing metadata
- Handles plugin updates and version management
- Provides plugin search and filtering capabilities

5. Plugin Management:

- Handles installation/removal of plugins
- Manages plugin lifecycle (loading/unloading)
- Tracks installed plugins
- Handles plugin dependencies
- Posts events when plugins change