Update Dependabot schedule and add dependency groups

[bartveneman]

Changed the update schedule for npm and GitHub Actions from weekly to monthly. Added groups for vite and oxc dependencies.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (4552e68) to head (c444972).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #57   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          149       149           
  Branches        21        21           
=========================================
  Hits           149       149           

☔ 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.