Add PreToolUse hook to remind using Glob/Grep/Read instead of find

[ikuwow]

Summary

Add a PreToolUse hook that detects find command usage in Bash tool calls and reminds the AI to consider using dedicated tools (Glob/Grep/Read) instead.

• Uses ^find prefix match so piped find or git grep are not affected
• Shows an ask dialog (not block), so find can still be used when truly needed

Motivation

Claude Code sometimes uses Bash(find ...) for file exploration when Glob/Grep/Read tools would be more appropriate and provide a better user experience. This hook adds a soft reminder without blocking legitimate use cases.

Closes #99

References

• Claude Code hooks documentation
• Hook output format follows the PreToolUse event spec: permissionDecision can be allow, deny, or ask

Verification

• shellcheck passes on the hook script
• pre-commit hooks pass
• Hook behavior (find command triggering the ask dialog) has not been manually tested yet

[ikuwow]

Closing: hook-based approach is not ideal since the AI cannot see the reminder. Will add a rule to AIRULES.md instead to prefer Glob/Grep/Read over find.