chore(release): 1.0.0-alpha.5 [skip ci]

# [1.0.0-alpha.5](https://git.gitlab.arm.com/bazel/git/compare/v1.0.0-alpha.4...v1.0.0-alpha.5) (2024-04-15)

### Features

* add `bazel-git show` command ([6b8f1675](https://git.gitlab.arm.com/bazel/git/commit/6b8f16750751ee09984029842883151c39848f3c))
* add `ls-tree` command ([19227f55](https://git.gitlab.arm.com/bazel/git/commit/19227f555e7c7717f1f07a4dd6368fbe9f7897f3))
* **cat-file:** support existence of files ([1aa84f82](https://git.gitlab.arm.com/bazel/git/commit/1aa84f825e03d1e10d576576a6c3a72ee5566507))