Replace .reuse with rules_license

Currently, we are using .reuse to determine the license to our files.

rules_license provides Bazel rules for applying the licensing. This would be much more powerful as the applied license can propogate through the build graph. A shared library for example, will have the license marked for the source files. Using rules_license rules we can generate a software bill of materials (SBOM) for the project as well.

The issue would involve replacing .reuse with rules_license rules.