Week 8 king minimum ordering

[wifiBlack]

Changes proposed in this pull request:

• Refactored kingOrdering and minDegreeOrdering to correctly map output using vertex IDs instead of internal indices.
• Replaced exception-based error handling with PostgreSQL-friendly NOTICE messages and graceful early returns.
• Introduced comprehensive SQL and pgTAP test coverage:
  • Edge case and crash-resilience tests for both algorithms.
  • Added inner query tests with PostgreSQL version checks.
• Cleaned up and fixed test SQL files to ensure both algorithms now return valid, testable results.
• Removed incorrect table setup code from kingOrdering.pg.

@pgRouting/admins