Motivation

• Ensure the --patch-agent-files flow can create missing agent docs instead of silently skipping them so users get a usable stub when running wtcraft init --patch-agent-files.
• Switch project licensing metadata from MIT to Apache-2.0 to reflect the intended license change across packaging manifests.

Description

• Update append_managed_block_if_missing in scripts/wtcraft and src/wtcraft/_shell.sh to create parent directories, write the managed block to the target file when it does not exist, and log Created and patched: <file> instead of skipping the file.
• Update README.md to document that --patch-agent-files will create CLAUDE.md or AGENTS.md with a managed stub if they do not exist.
• Change license fields from MIT to Apache-2.0 in package.json and pyproject.toml, and update the PyPI classifier to Apache Software License in pyproject.toml.

Testing

• No automated tests were added or executed as part of this change.

Codex Task