[WIP] Add detailed API documentation for OpenCode

[Copilot]

• Analyze current documentation structure and identify gaps
• Create comprehensive events documentation page (events.mdx)
• Add detailed descriptions for each event type with properties and use cases
• Document event subscription patterns and examples
• Add cross-references to related APIs
• Update server.mdx to link to the new events page
• Add detailed descriptions and curl examples for each API section
• Enhance SDK events section with cross-reference to events page
• Add quick reference table showing all event types at a glance
• Verify documentation builds correctly
• Review and validate documentation accuracy

Original prompt

Deepdive on the API and events that take place in opencode the openapi docs are not gret so getting some new more detailed ones would be. serious win

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