feat: Add method aliases - #55

- add method_aliases to ProjectConfiguration as Vec<AliasRule>

- default method_aliases to empty for backward-compatible no-alias configs

- set loader-created configurations to empty alias rules for now

- expose alias rule model and parser/validator entrypoint

- export typed alias validation error metadata for loader/cli integration

- change ProjectConfigurations::parse to return explicit load errors

- compile and validate method_aliases with aggregated config-aware diagnostics

- add loader tests for invalid alias rows and unchanged no-alias behavior

- add be_{} mapping for *? predicates

- add have_{} mapping for has_*? predicates

- add snakecase mapping for *Validator constants

- return explicit loader errors and keep default fallback only when user config is missing

- fail normal CLI runs with actionable config-load messaging

- report doctor config-load failures as Error while keeping success status output

- add one-pass alias candidate expansion for token strings
- render alias templates with literal, capture, and snakecase parts
- cover dedupe, self-map dropping, and capture preservation in unit tests

- add alias-aware assertion and matcher entry points with compatibility wrappers
- expand both matcher and observed tokens for equality-style token assertions
- route low-likelihood and matches-if checks through configured method_aliases

- assert alias validation issues by stable fields and message fragments

- make aggregated validation checks order-independent

- cover malformed wildcard and unknown template token parsing failures

- switch invalid pattern and transform assertions to stable field/fragment checks
- add multi-error validation test covering malformed wildcard and unknown token classes
- keep aggregated validation checks order-independent to avoid brittle test failures

- add explicit wildcard/transform equivalence tests for *?, has_*?, and *Validator rules
- add deterministic one-pass candidate expansion test to prevent recursive alias chaining
- preserve and extend alias-aware equality behavior coverage without changing matcher logic

- add YAML-driven low_likelihood tests for *?, has_*?, and *Validator alias forms

- add YAML-driven codebase_config_match tests for canonical alias equivalence

- keep explicit no-alias regression checks for low-likelihood and codebase matching