Improve documentation for CSP and permissions types

Add detailed JSDoc comments to `McpUiResourceCsp`, `McpUiResourcePermissions`,
and `McpUiResourceMeta` interfaces:

- Document CSP directive mappings for `connectDomains`, `resourceDomains`,
  `frameDomains`, and `baseUriDomains`
- Add usage examples showing typical domain patterns
- Clarify Permission Policy mappings for `camera`, `microphone`, `geolocation`,
  and `clipboardWrite`
- Explain `domain` field's host-dependent behavior with concrete examples
- Document `prefersBorder` semantics including true/false/omitted behavior

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jonathanhefner