Complete: Add conformance tests for CFA (CFA-15)

- Create TS2454 edge case test file covering:
  - Class heritage CFA
  - Static block definite assignment
  - Computed property CFA
  - Abstract class patterns
  - Closure capture scenarios
  - Complex control flow edge cases
  - Type guard and assertion scenarios

- Create TS2564 edge case test file covering:
  - Computed property names in classes
  - Symbol property initialization
  - Class expression type inference
  - Derived class initialization
  - Constructor control flow patterns
  - Special property patterns
  - Parameter properties

- Add FlowGraph path verification tests:
  - If-else branch capture
  - Switch statement case capture
  - Try-catch-finally path capture
  - Loop break/continue capture
  - Nested control structure flow
  - Class constructor flow

- Add CFA benchmark suite for performance tracking:
  - Parse and bind benchmarks
  - Type check benchmarks
  - Flow analysis benchmarks
  - Scaling benchmarks (branches, nesting)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: mohsen1