Bump version v2.5.0 -> v3.0.0a0

[danielhollas]

Let's release a 3 alpha version for an easier testing with the nbclassic image

(needs to be merged with a merged commit!)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.77%. Comparing base (68d9e6e) to head (da54f24).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #741   +/-   ##
=======================================
  Coverage   84.77%   84.77%           
=======================================
  Files          18       18           
  Lines        3336     3336           
=======================================
  Hits         2828     2828           
  Misses        508      508           

Flag	Coverage Δ
python-3.11	84.74% <100.00%> (ø)
python-3.12	84.74% <100.00%> (ø)
python-3.9	84.75% <100.00%> (+0.36%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[edan-bainglass]

👍 but why merge commit?

[danielhollas]

@edan-bainglass good question, tl;dr is that the commit in this PR is already tagged, so squashing or rebasing would create a new commit and we would lose the tag (or rather the tag would stay on github but would point to a commit that's not on a main branch)

I ran bumpver as

bumpver update  --major --tag alpha

The current release process is described on the wiki: https://github.com/aiidalab/aiidalab/wiki/Development-guide#releasing-a-new-version

We should make it less complicated, happy to discuss at some point when you have time.

[danielhollas]

New release is now available 🚀

https://github.com/aiidalab/aiidalab-widgets-base/releases/tag/v3.0.0a0