feat(ls): migrate disallowing equivalent paths in OAS2

[lukaszzazulak]

Migrate linting rule for disallowing equivalent paths in OAS2

[Copilot]

Pull Request Overview

This PR migrates a linting rule to detect and disallow equivalent paths in OpenAPI 2.0 specifications. The rule identifies when paths with different parameter names but the same structure (e.g., /items/{id} and /items/{itemId}) are defined, which violates OpenAPI 2.0 specification requirements.

• Added a new linter function apilintNoEquivalentPaths that normalizes path templates to detect equivalency
• Created a new lint rule configuration for OpenAPI 2.0 path templates
• Added comprehensive test coverage with a test fixture demonstrating the violation

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/apidom-ls/src/services/validation/linter-functions.ts	Implements the core logic for detecting equivalent paths by normalizing path templates
packages/apidom-ls/src/config/openapi/path-template/lint/equivalent-paths-not-allowed.ts	Defines the lint rule configuration with error code, message, and target specifications
packages/apidom-ls/src/config/openapi/path-template/lint/index.ts	Registers the new lint rule in the path template linting system
packages/apidom-ls/src/config/codes.ts	Adds the new error code for equivalent paths validation
packages/apidom-ls/test/validate.ts	Adds test case verifying the linting rule works correctly
packages/apidom-ls/test/fixtures/validation/oas/equivalent-paths-not-allowed.yaml	Test fixture with equivalent paths to trigger the validation error