feat: file-read gate allows Edit, add legacy-peer-deps for grammar install

- Change file-read gate from deny to allow with limit:1, injecting the
  observation timeline as additionalContext. Edit now works on gated files
  since the file registers as "read" with near-zero token cost.
- Add updatedInput to HookResult type for PreToolUse hooks.
- Add .npmrc with legacy-peer-deps=true for tree-sitter peer dep conflicts.
- Add --legacy-peer-deps to npm fallback paths in smart-install.js so end
  users without bun can install the 24 grammar packages.
- Rebuild plugin artifacts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/cli/types.ts

@@ -22,6 +22,7 @@ export interface HookResult {
     additionalContext: string;
     permissionDecision?: 'allow' | 'deny';
     permissionDecisionReason?: string;
+    updatedInput?: Record<string, unknown>;
   };
   systemMessage?: string;
   exitCode?: number;