Rules Refactor Part 2: Migrate career rules to use has_skill helper

[coderabbitai]

Context

Follow-up to PR #14 (Rules Refactor Part 1) which migrated aspiration rules to use events and the has_skill helper function.

The career rules should be similarly refactored to use the has_skill helper for consistency and maintainability.

Tasks

• Refactor all career rule functions to use the has_skill helper instead of state.has() directly
• Review and address related TODOs in the career logic:
  • Rules.py:22 - TODO: Part Time Jobs?
  • Rules.py:719 - TODO check project manager career logic (Discord: https://discord.com/channels/731205301247803413/1079002955262480424/1403764728177758252)
  • Rules.py:799 - TODO relearn how the career locations send, and then refactor this to use has_skill
• Test to ensure no regressions

Reference

• PR Sims 4: Rules Refactor Part 1 #14: Sims 4: Rules Refactor Part 1 #14
• Requested by: @benny-dreamly

Example

See the aspiration rules in Rules.py (functions like _bodybuilder, _painter_extraordinaire, etc.) for examples of the pattern to follow.