Pin bazel and dev dependencies

[mickvangelderen]

Before I was able to build I had to make these changes:

1. add a .bazelversion to pin bazel

7.6.1

2. pin the google abseil version in WORKSPACE

http_archive(
    name = "com_google_absl",
    strip_prefix = "abseil-cpp-20230125.3",
    urls = ["https://github.com/abseil/abseil-cpp/archive/refs/tags/20230125.3.zip"],
)

3. disable bzlmod in .bazelrc

common --enable_bzlmod=false
common --enable_workspace=true