[Gitlab Code Parser] Create POC for publishing a Go package for the parser

Problem to solve

We will need to generate a Go package from gitlab-code-parser, which will be written in Rust, so that it can be used in the embeddings indexer and other Go projects.

Proposed solution

Create a proof of concept for publishing a Go package from a Rust library that can be retrieved using go get -u gitlab.com/gitlab-org/code-creation/gitlab-code-parser (or similar).