[FEATURE] GAP-097: Claude Code plugin and project-level mcp.json globs

[hello-args]

Summary

Discover project-level mcp.json files and Claude Code plugin MCP configs (GAP-097).

Problem

GAP-097 is Missing (P1). Auto-discovery does not walk project trees or plugin layouts.

Distinct from #294: #294 covers VS Code settings/mcp.servers shape when using --config-path on an explicit file. This issue covers discovery of project-level and plugin paths (globs, walk rules).

Expected Behavior

• Configurable globs or registry entries (e.g. **/.mcp.json, Claude Code plugin dirs)
• Performance limits documented (depth, ignore rules)

References

• GAP-097 — feature expansion plan
• [FEATURE] GAP-096: VS Code workspaceStorage MCP profile discovery #294 — VS Code settings parse for --config-path

Acceptance Criteria

• Discovery implementation + tests
• Documented paths and performance limits
• Does not duplicate --config-path single-file scoping ([SECURITY] mcts inventory reads local MCP configs without consent gate #87)