Add Context7 documentation for @ottersight/scanner and @ottersight/cli

[pikespeak]

Problem

Context7 is an MCP server that provides up-to-date library documentation to AI assistants (Claude, Cursor, Copilot). When developers ask their AI assistant about OtterSight, Context7 has no documentation to serve — the AI falls back on (potentially stale) training data.

Expected behavior

AI assistants using Context7 can fetch current OtterSight documentation:

User: "How do I use @ottersight/scanner to scan a project?"
AI: [fetches docs from Context7] → accurate, up-to-date API reference

Scope

• Register @ottersight/scanner and @ottersight/cli in Context7's library index
• Provide structured documentation covering:
  • scanLocal() API (parameters, return types, examples)
  • loadKev(), loadEuvdMapping(), lookupLatestVersions() APIs
  • CLI usage (ottersight scan ., flags, exit codes)
  • Docker usage
  • Prerequisites (Syft, Grype)

References

• Context7 MCP: https://github.com/upstash/context7
• Registration process: submit library docs via their contribution flow