build: Publish release pipeline

[gregorydemay]

Follow-up on #4 to publish the release:

1. Checkout the latest version from the main branch
2. Retrieve the build artifacts from that commit (sol_rpc_canister.wasm.gz)
3. Create a git tag for the version and publish Rust libraries to crates.io
4. Create a Github release containing the build artifacts and the changelog entries for that version.

Excepted for publishing the artifacts on crates.io, the Publish pipeline was successfully manually tested (example here)