fix(hookify): keep stop and prompt rules out of unrelated tool hooks

[AliFozooni]

Summary

Hookify currently lets unrelated rules evaluate during PreToolUse and PostToolUse when the active tool is outside the Bash/file-edit paths.

This change:

• scopes unmapped PreToolUse / PostToolUse tools to event: all
• prevents reason, transcript, and user_prompt from resolving outside their actual hook events
• adds regression tests covering the misfire while preserving event: all behavior

Test Plan

• python3 -m unittest plugins/hookify/tests/test_event_filtering.py