Add semantic release

[sebbonnet]

Use semantic-release to automate versioning, tag and create GitHub releases based on the commit message.
semantic-release works from release branches, not pull requests. As a result, nothing will be released on pull requests.

Commit messages must follow Angular Commit Message Conventions

Also improve the docs to make the limitations clearer and describe the improvements we want to work on

[github-actions]

Test Results

32 tests  ±0   32 ✅ ±0   12s ⏱️ -3s
 5 suites ±0    0 💤 ±0 
 2 files   ±0    0 ❌ ±0 

Results for commit 04a9cbd. ± Comparison against base commit 50bc86b.

♻️ This comment has been updated with latest results.

[sebbonnet]

I've considered building the distros in parallel in 9442ed8 to speed things up and add a bit more structure to our workflow.
Although we gain about 4mins, it adds some duplication as we need to setup up nix , but also increases complexity as we need to store the distros as artifacts in the new job, so we can download and publish them in the release job. So in the end I preferred going for a simple approach and have all the release steps in the same job.

[github-actions]

🎉 This PR is included in version 1.0.0 🎉

The release is available on GitHub release

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