refactor: drop 12 runtimes, keep Claude, Codex, OpenCode, Cursor, ZCode, Antigravity

Removes kilo, kimi, kimi-code, copilot, windsurf, augment, trae, qwen, hermes,
cline, codebuddy and pi end to end: capability descriptors, installer branches
and converters (bin/install.js 14.9k -> 11.2k lines), TypeScript converters,
hook surfaces and runtime homes, review lanes qwen/kimi-code, the two pi
migrations, Kimi payload normalization in the hook guards, dead hostBehaviors
vocabulary, launcher home probes, fixtures, runtime-specific tests and the
prose that presented them as supported.

Installer output for the six kept runtimes is byte-identical to before the
prune. The Kimi tool-vocabulary tests in workflow-guard, read-guard and
read-injection-scanner are left in place pending a decision.

scripts/docs-guard-registry.cjs

@@ -316,7 +316,6 @@ const DOCS_GUARD_TESTS = {
   'tests/intel.test.cjs': ['*'],
   'tests/inventory-headings-countfree.test.cjs': ['docs/INVENTORY.md'],
   'tests/inventory-manifest-sync.test.cjs': ['docs/INVENTORY.md', 'docs/INVENTORY-MANIFEST.json'],
-  'tests/kilo-upgrades.test.cjs': ['docs/how-to/connect-msd-mcp-server.md'],
   'tests/live-config-guard.test.cjs': ['docs/TESTING-SUITES.md'],
   // #3726: pins the `milestone complete` synopsis (English + four localized
   // mirrors), the `--confirm` flag row and the guard-override instructions —