feat(claude): add dotbot-validate and config-warn hooks

.claude/hooks/post-edit-config-warn.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Post-edit: warn when formatter/linter configs are changed,
+# since they affect the entire repo's code style.
+
+fp=$(jq -r '.tool_input.file_path // empty')
+[ -z "$fp" ] || [ ! -f "$fp" ] && exit 0
+
+case "$(basename "$fp")" in
+  .editorconfig | biome.json | .prettierrc.json | .shellcheckrc | stylua.toml | .yamllint.yml)
+    echo "NOTE: Formatter/linter config changed ($fp)." >&2
+    echo "Run 'pre-commit run --all-files' to verify consistency." >&2
+    ;;
+esac
+
+exit 0