chore: replace upstream pre-push hook with Neuron guard, drop husky and vendor .github metadata

package.json

@@ -16,7 +16,6 @@
     "typecheck": "bun turbo typecheck",
     "upgrade-opentui": "bun run script/upgrade-opentui.ts",
     "postinstall": "bun run --cwd packages/core fix-node-pty",
-    "prepare": "husky",
     "random": "echo 'Random script'",
     "sso": "aws sso login --sso-session=opencode --no-browser",
     "translate:app": "bun run script/translate-app.ts",
@@ -101,7 +100,6 @@
     "@types/mime-types": "3.0.1",
     "@typescript/native-preview": "catalog:",
     "glob": "13.0.5",
-    "husky": "9.1.7",
     "oxlint": "1.60.0",
     "oxlint-tsgolint": "0.21.0",
     "prettier": "3.6.2",