docs: add comprehensive Stardoc API documentation and cleanup internal docs

Add auto-generated API documentation for all rule files using Stardoc with
Astro frontmatter integration. Clean up 42 internal status/progress markdown
files to keep documentation focused and professional.

API Documentation (10 rule categories, 142K total):
- Create Stardoc targets for cpp, rust, go, js, wit, wasm, wkg, wac, wrpc rules
- Add Astro frontmatter to all generated docs using pure Bazel genrule
- Deploy generated docs to docs-site/src/content/docs/api/
- Total: 10 comprehensive API reference files auto-generated from source

Build System Improvements:
- Add missing bzl_library targets (wit_markdown, wac_bundle, wac_plug, etc.)
- Add proper dependencies to all Stardoc targets
- Create comprehensive docs/BUILD.bazel with organized sections

Docstring Fixes (Stardoc compatibility):
- Fix wkg/defs.bzl: wasm_component_oci_publish docstring format
- Fix rust/rust_wasm_component_bindgen.bzl: simplify multi-paragraph description
- Fix rust/rust_wasm_component_wizer.bzl: consolidate description
- Fix rust/rust_wasm_binary.bzl: simplify description

Documentation Cleanup (removed 42 files):
- Delete root-level status docs (ACHIEVEMENTS.md, HERMITICITY.md, etc.)
- Delete internal planning docs (DOCUMENTATION_PLAN.md, INTEGRATION_PLAN.md, etc.)
- Delete duplicate documentation (docs/examples/ directory)
- Delete Claude skill docs and internal tool notes
- Keep only user/developer-facing documentation

Result:
- Clean, professional documentation structure (94 → 52 files)
- Comprehensive auto-generated API reference
- Pure Bazel implementation (no shell scripts for doc generation)
- Ready for Astro/Starlight docs site integration

Author: avrabe