feat: Add Dependabot for automatic updates

[shymega]

Description

This PR allows Dependabot to open PRs to automatically update dependencies when new versions are released.

We may want to introduce different groups for minor/patch semver bumps, to be automatically merged, and more risky bumps to be reviewed in future.

Type of change

• 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 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
• Any dependent changes have been merged and published in downstream modules

[shymega]

@bergercookie As discussed over email, I've gotten round to helping out with this. However, there's a lot of outdated deps, and the pyproject.toml file is a bit stale.

If you could approve and merge this PR first, Dependabot can update the dependencies, and I can move to getting #162 ready.

Cheers.

[nikoskoukis-slamcore]

Hi @shymega ,

I 've almost finished migrating the config to uv in a separate branch. Let me get that in first, and I'll ping you once that's done :)

[bergercookie]

Made some adjustments to this (since we're now using uv)
Merging this, thanks!