* Add support for bazel
Bazel support for the magic_enum repository would help others using
bazel integrate this library into their projects.
This PR adds a BUILD file which enables magic_enum to be imported
seamlessly into other WORKSPACE files without having to write a custom
BUILD file.
It also adds bazel binaries & tests to enable running them via bazel
locally:
export CC=clang ; bazel build //... ; bazel test //... ; bazel run //:example
Finally, bazel compilation artifacts are added to the gitignore file.
* Update BUILD file & specify http_archive in README
* Lint BUILD file
