Implement CommanderTaxCounter - tracks casting cost increases for
commanders that have been cast multiple times.
Key components:
- CommanderTaxCounter: specialized counter with value clamping
- AbstractCounter modifications: support for counter ID system
- CounterGeneral/TranslateCounterName: UI integration for display
Design decisions:
- Counter values clamped to valid range (0 to max)
- Builds on counter_ids.h constants from commit 1
- Uses z_values.h from commit 4 for proper visual layering
- Counter visibility tied to zone state (hidden when zone hidden)
Test coverage:
- commander_tax_counter_test: verifies setValue clamping behavior
- counter_visibility_test: verifies visibility state transitions
Note: Tests include <climits> for INT_MIN usage (required on some compilers
like GCC on Debian 11 where INT_MIN is not transitively included).
