chore(release): 1.0.0-alpha.7 [skip ci]

# [1.0.0-alpha.7](https://git.gitlab.arm.com/bazel/rules_toolchain/compare/v1.0.0-alpha.6...v1.0.0-alpha.7) (2023-12-08)

### Bug Fixes

* be graceful when `uname` is not found ([6f4242c1](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/6f4242c19284b424ffd4079c0a02ed6a2bdef103))
* correct `{{basename}}` in `which` ([892c6233](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/892c6233cce27d1ff2a6b950d3ddca1e34b807ff))
* fail fast when not three Linux version parts ([e298c3e5](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/e298c3e5e0674809bd62def624aaf0104089468e))
* need to foward on `.cmd` not `.com` ([49d7c9fd](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/49d7c9fd03763b135cf2e19db16ddfe30e00c8a5))
* pin Bazel version ([585e5f41](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/585e5f4168736c050687be6e59c359ab3a50f8ae))
* **resolved:** propagate `.bat`/`.com` extensions ([b0a41761](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/b0a4176194fcf379e4ab4a8ac9f213f34bc9771c))
* **select:** add `map` to the error string ([727be3b7](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/727be3b7570aebda46b78560cd98cbaa74368b99))
* **symlink_target:** propagate `.bat`/`.com` extensions ([78a62657](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/78a62657e5dc911a75418afb28243e0d29f3db93))
* **symlink_target:** use `ctx.executable` ([fdf8d732](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/fdf8d732de0a1137172d0cbd311277834760dbe8))
* **test:** simplify POSIX variable substitution ([82a4ecaa](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/82a4ecaa71dbd06c98f24ef5fb4dc40ad58a40a6))

### Features

* add `//toolchain/constraint/libc:ucrt` ([4deb57e8](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/4deb57e881ad3fd4e43b49bc5a6724ad0db68ffd))
* add `//toolchain/constraint/os:windows` ([064ecafc](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/064ecafcc9b0a1ed3afc3c62c459f0b541438b27))
* add a plain string value to local triplet repository ([e41e05ff](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/e41e05ffec1208b535ccfdcb4d70bc5d4c9311af))
* add launcher ([96823abd](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/96823abd1096cb17d81b554072916450f6944fa7))
* add simple Windows OS detection ([a090eabe](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/a090eabe2dae4e52eb611c610c617437a31a46f0))
* add Universal C runtime detection ([cd8b097b](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/cd8b097bd731403b3502214fffefb15089a975be))
* add Windows version detection ([b2d0c537](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/b2d0c53752ca2488a7ae9c70697591098bdb06b3))
* **local/which:** support Windows ([1398d386](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/1398d3869c59f6500def3894c4065ef2d9a0d9a1))
* **select:** add more selection options ([22e5104a](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/22e5104a50b8fcfdffed77a2c8af82bdb79c512f))
* **test:** add Batch script for Windows ([ea1a75db](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/ea1a75db5b906e31646d0e41adad7b8ad8a63381))
* **toolchain_triplet:** add Windows support ([32e2220d](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/32e2220df6254455713d331f9cbd4509fb9d9bc8))