feat(hooks): add tool-output-truncator for dynamic context-aware truncation

Refactor grep-output-truncator into a general-purpose tool-output-truncator
that applies dynamic truncation to multiple tools based on context window usage.

Truncated tools:
- Grep, safe_grep (existing)
- Glob, safe_glob (new)
- lsp_find_references (new)
- lsp_document_symbols (new)
- lsp_workspace_symbols (new)
- lsp_diagnostics (new)
- ast_grep_search (new)

Uses the new dynamic-truncator utility from shared/ for context-aware
output size limits based on remaining context window tokens.

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src/config/schema.ts

@@ -44,6 +44,7 @@ export const HookNameSchema = z.enum([
   "session-notification",
   "comment-checker",
   "grep-output-truncator",
+  "tool-output-truncator",
   "directory-agents-injector",
   "directory-readme-injector",
   "empty-task-response-detector",
@@ -52,7 +53,7 @@ export const HookNameSchema = z.enum([
   "rules-injector",
   "background-notification",
   "auto-update-checker",
-  "ultrawork-mode",
+  "keyword-detector",
   "agent-usage-reminder",
 ])