feat(website): Parse plugins JSON and list extensions on website

[suuus]

Context

Following the addition of external plugin support in #50, the git-ape website should dynamically list available extensions by parsing the plugins JSON configuration file.

Requirements

• Parse the external plugins JSON file from /plugins
• Display available plugins on the website with metadata (name, description, author, etc.)
• Keep the listing in sync with the repository source of truth
• Include links to plugin documentation and installation instructions

Related

• PR feat(plugin): add ape-context plugin for enhanced context management #50 - feat(plugin): add ape-context plugin for enhanced context management