refactor: consolidate duplicate utility functions (#12439)

* refactor: consolidate duplicate utility functions

- Add escapeRegExp to src/utils.ts and remove 10 local duplicates
- Rename bash-tools clampNumber to clampWithDefault (different signature)
- Centralize formatError calls to use formatErrorMessage from infra/errors.ts
- Re-export formatErrorMessage from cli/cli-utils.ts to preserve API

* refactor: consolidate remaining escapeRegExp duplicates

* refactor: consolidate sleep, stripAnsi, and clamp duplicates

src/auto-reply/commands-registry.ts

@@ -14,6 +14,7 @@ import type {
 } from "./commands-registry.types.js";
 import { DEFAULT_MODEL, DEFAULT_PROVIDER } from "../agents/defaults.js";
 import { resolveConfiguredModelRef } from "../agents/model-selection.js";
+import { escapeRegExp } from "../utils.js";
 import { getChatCommands, getNativeCommandSurfaces } from "./commands-registry.data.js";
 
 export type {
@@ -68,10 +69,6 @@ function getTextAliasMap(): Map<string, TextAliasSpec> {
   return map;
 }
 
-function escapeRegExp(value: string) {
-  return value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
-}
-
 function buildSkillCommandDefinitions(skillCommands?: SkillCommandSpec[]): ChatCommandDefinition[] {
   if (!skillCommands || skillCommands.length === 0) {
     return [];