Add djade linter for Django templates (Fixes #2372)

[aNsHuL5217]

Summary

This PR adds the djade linter to the project's pre-commit configuration and applies formatting fixes to existing Django templates. This ensures consistent code style (e.g., standardizing whitespace in {{ variables }}) across the codebase. Fixes #2372

Rationale

As discussed in #2372, djade was selected over alternatives like djLint because djade is actively maintained and specifically targets Django template formatting. This aligns with the project's goal of using stable, long-term tools.

Changes

• Configuration: Added adamchainz/djade-pre-commit (v1.6.0) to .pre-commit-config.yaml.
• Formatting: Ran the linter across all files, which automatically updated inconsistent spacing in .html templates.

Verification

• Ran pre-commit run djade --all-files locally (passed formatting checks).

[sarahboyce]

Thank you! A couple of minor nitpicks

[sarahboyce]

Looks good to me!

[aNsHuL5217]

Thanks for the review and approval, @sarahboyce! I appreciate the guidance on the configuration details.

I’ll leave the commits as they are for now, assuming they will be squashed upon merging. Ready when you are!

[ulgens]

I'll ask for a rebase from the latest main (not a merge in) and resolution of conflicts. Other than that, looks awesome.

[aNsHuL5217]

@ulgens Done! I've rebased on main and resolved the conflicts in doc.html.I also verified that the linter passes locally. Ready for merge!

[ulgens]

@aNsHuL5217 Thank you. Adding my approval, considering the PR will be squash merged. Adding the mergers team for review.

[sarahboyce]

Can you resolve the conflicts and rerun thr linter based off Django 6.0?

[aNsHuL5217]

@sarahboyce Done! I've rebased on main, updated djade to 1.7.0, and set the target version to 6.0. The linter caught a few new changes with the upgrade. Ready for review!

[sarahboyce]

Thank you for the updates! I have a couple of questions which I think will have come from resolving conflicts

[aNsHuL5217]

@sarahboyce Fixed! I reset base_foundation.html and flatpages/foundation.html to match main and re-ran the linter. They should be correct now.