Migrate abilities from AbilityId to AbilityMechanic

[bcollazo]

Summary

• migrate remaining ability execution, hooks, validation, and move generation from AbilityId to AbilityMechanic
• remove the AbilityId module entirely and replace old card-id checks with effect-mechanic lookups
• add a migration regression test for all legacy ability-backed cards and rename the example migration tests

Verification

• cargo check
• cargo fmt --check
• cargo clippy --all-targets --all-features -- -D warnings
• cargo test --features test-utils --test ability_mechanic_migration_test --test ability_mechanic_examples_test
• rg -n "AbilityId|ability_ids|ability_id_migration" /repo