Remove all references to MaxCapacity/MinCapacity from docs, tests, and code

[coderabbitai[bot]]

Context

During the review of PR #206 (https://github.com/TemoaProject/temoa/pull/206), it was identified that the codebase contains references to max_capacity/min_capacity and MaxCapacity/MinCapacity that do not match the actual TemoaModel attributes.

The actual TemoaModel uses limit_capacity and limit_new_capacity instead.

Tasks

• [ ] Remove unused max_capacity and min_capacity mock attributes from tests/test_pricing_check.py
• [ ] Search for and remove all mentions of MaxCapacity and MinCapacity from documentation
• [ ] Search for and remove all mentions of max_capacity and min_capacity from tests
• [ ] Audit code for any remaining references to these deprecated constraint names
• [ ] Ensure all references use the correct attribute names: limit_capacity and limit_new_capacity

Reference

• Original comment: https://github.com/TemoaProject/temoa/pull/206#discussion_r2539896484
• Requested by: @ParticularlyPythonicBS

This issue was identified as necessary but out of scope for PR #206.