fix(build): include specify_cli.bundler.lib in built distribution

[antst]

Summary

Installing from source (e.g. uv tool install specify-cli --from git+https://github.com/github/spec-kit.git) currently produces a completely broken CLI — every command crashes on startup:

ModuleNotFoundError: No module named 'specify_cli.bundler.lib'
  File ".../specify_cli/__init__.py", line 615, in <module>
    from .commands.bundle import register as _register_bundle_cmds
  File ".../specify_cli/commands/bundle/__init__.py", line 18, in <module>
    from ...bundler.lib.project import (...)

This affects init, check, everything — because commands/bundle/__init__.py is imported at top level in specify_cli/__init__.py, and it imports specify_cli.bundler.lib.project. Introduced together with the specify bundle command (#3070), which added the src/specify_cli/bundler/lib/ package.

Root cause

The package src/specify_cli/bundler/lib/ is tracked in git, but it is missing from the built wheel. The cause is the root .gitignore:

lib/
lib64/

These come from the standard GitHub Python template and are meant to ignore a top-level build/virtualenv lib directory. Because the patterns are unanchored, they also match the source package src/specify_cli/bundler/lib/. Hatchling applies .gitignore patterns as build-exclusion rules, so it silently drops bundler/lib from the wheel even though the files are tracked.

Sibling packages (bundler/models/, bundler/services/, …) are unaffected because only the directory literally named lib matches the pattern.

Reproduction (current main)

$ uv build --wheel
$ unzip -l dist/specify_cli-*.whl | grep -c 'bundler/lib/'
0          # bundler/lib is absent
$ unzip -l dist/specify_cli-*.whl | grep -c 'bundler/services/'
10         # siblings are present

Fix

Anchor the patterns to the repository root so they only match the intended top-level build artifacts:

-lib/
-lib64/
+/lib/
+/lib64/

This preserves the original intent (ignore a root-level lib/lib64 build/venv dir) while no longer excluding the source package.

Verification (with this change)

$ uv build --wheel
$ unzip -l dist/specify_cli-*.whl | grep 'bundler/lib/'
  specify_cli/bundler/lib/__init__.py
  specify_cli/bundler/lib/project.py
  specify_cli/bundler/lib/versioning.py
  specify_cli/bundler/lib/yamlio.py

# install the built wheel into a fresh venv:
$ specify --version
specify 0.11.4.dev0
$ specify bundle --help
 Usage: specify bundle [OPTIONS] COMMAND [ARGS]...
 Discover, install, and author Spec Kit bundles

The CLI now loads, and specify bundle works.

Alternative considered: a Hatchling force-include/artifacts entry for bundler/lib. Anchoring the .gitignore patterns was chosen because it fixes the actual root cause (an over-broad ignore pattern), covers both the sdist and wheel targets, and protects any future source directory that happens to be named lib.

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[mnriem]

Thank you!