feat(config): improve configuration with zero-config and flexible ins…

…tallation

This update significantly improves the plugin's configuration and installation
flexibility, with an emphasis on zero-config usage.

Zero Configuration Support:

Default port to 37373
Default config path to ~/.config/mcphub/servers.json
Auto-create config file with empty mcpServers object
Works out of the box with just require("mcphub").setup({})
Installation Improvements:

Default Installation (Global npm):

Continues to work with npm install -g mcp-hub
No additional configuration needed

Bundled Installation (No global npm access):

Add bundled_build.lua for local mcp-hub installation
Auto-updates with plugin updates
Enable with use_bundled_binary = true
No global npm permissions required

Custom Installation Support:

Flexible cmd and cmdArgs configuration
Supports NixOS and other custom environments
Example configurations provided in docs

Documentation:
Updated README with all installation methods
Added zero-config setup examples
Improved configuration documentation
Clear guidance for different use cases
Breaking Changes: None. Enhances existing functionality while
maintaining backward compatibility.

.gitignore

@@ -2,5 +2,6 @@
 node_modules
 junk/
 *.avanterules
+bundled/
 
 .r*