ci: automate draft releases on master via semantic-release

[hbgit]

Add a Release workflow that, on every push to master:

• builds the full tool (KLEE 3.1 + LibFuzzer) inside the ghcr.io/hbgit/map2check-dev image and installs to release/
• copies utils/map2check-wrapper.py, LICENSE and README.md into release/ and zips it (scripts/package-release.sh)
• runs semantic-release (.releaserc.json) to compute the next semver tag from Conventional Commits, generate release notes, and publish a GitHub Draft Release with the zip attached

Requires the baseline tag v8.0.0 on master so versioning continues from the current project version instead of restarting at 1.0.0.

Description

Please include a summary of the your pull request. Please also include relevant motivation and context. List any dependencies that are required for this change.

Your checklist for this pull request

• Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Don't request your master!
• Make sure you are making a pull request against the canary branch (left side). Also you should start your branch off our canary.
• Check the commit's or even all commits' message styles matches our requested structure.
• Check your code additions will fail neither code linting checks nor unit test.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Thank you!