Add semantic-based WorkflowStep detection

[Caio-Nogueira]

Add semantic-based WorkflowStep detection for accurate linting

Replaces the previous name-based heuristic detection with proper semantic analysis to accurately identify WorkflowStep parameters, eliminating false positives and false negatives.

TypeScript Detection:

• Detects parameters with type annotation WorkflowStep (from @cloudflare/workers-types ambient declarations)
• No import required - works with any function/method that has a WorkflowStep typed parameter

JavaScript Detection (Heuristic):

• For JS files without type annotations, infers the 2nd parameter of run() methods in classes extending WorkflowEntrypoint (imported from "cloudflare:workers") as a WorkflowStep
  False Positive Prevention:
• Objects named "step" that are NOT typed as WorkflowStep are no longer flagged
• Parameters with different type names (e.g., WS, Step) are not flagged

Technical Details

• Added oxc_semantic for symbol resolution
• Created WorkflowStepSymbols to track known WorkflowStep symbol IDs
• Uses semantic reference resolution to verify step method calls