Add ai-code-project-template repo files.

tools/README.md

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+# Tools Directory
+
+This directory contains utilities for the recipe-tool project.
+
+## Core Utilities
+
+### AI Context Generation
+
+- `build_ai_context_files.py` - Main orchestrator for collecting project files into AI context documents
+- `collect_files.py` - Core utility for pattern-based file collection with glob support
+- `build_git_collector_files.py` - Downloads external documentation using git-collector
+
+### Other Tools
+
+- `list_by_filesize.py` - List files sorted by size for analysis