Add project-level run defaults to fabro.toml so sandbox, LLM, hooks,
MCP servers, and other settings can be shared across workflows instead
of duplicated in each workflow.toml. Precedence: workflow.toml >
fabro.toml > cli.toml/server.toml.
- Rename `directory` → `work_dir` with backwards-compat serde alias
- Add `hooks` and `mcp_servers` to `RunDefaults` with merge logic
- Extend `ProjectConfig` with all run-defaults fields + `into_run_defaults()`
- Remove duplicate `McpServerEntry` from fabro-config (use run_config's)
- Move `hook_config` from ServerConfig into `run_defaults.hooks`
- Wire project config merge and hooks/mcp fallbacks in run_command()
- Update OpenAPI spec and regenerate TypeScript client
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Update 47 MDX doc pages, OpenAPI spec, SVG diagram, language
grammar, frontend demo data, marketing page, skills, and README
to use .fabro extension. Add "fabro" to fileTypes in language
grammars. Document stack.child_workflow alongside stack.child_dotfile.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>