feat(rules): add prefer-early-return lint rule 👽

- Add createEarlyReturnFix function for auto-fixing nested conditions
- Add documentation with valid/invalid examples
- Add hasNestedConditions validator for detecting problematic patterns
- Add PreferEarlyReturn rule implementation with auto-fix support
- Add test cases for the new rule
- Add type guards for BlockStatement, IfStatement, and ReturnStatement nodes
- Register prefer-early-return rule in main plugin exports
- Update README with new rule documentation

Author: NeaByteLab

README.md

@@ -10,6 +10,7 @@ Deno lint plugin collection for identifying and reporting on patterns found in c
 - [`prefer-nullish-coalescing`](./examples/prefer-nullish-coalescing.md) - Prefers nullish coalescing (??) over logical OR (||) for null/undefined checks
 - [`prefer-optional-chain`](./examples/prefer-optional-chain.md) - Prefers optional chaining (?.) over logical AND (&&) for property access
 - [`prefer-template-literals`](./examples/prefer-template-literals.md) - Prefers template literals over string concatenation
+- [`prefer-early-return`](./examples/prefer-early-return.md) - Prefers early returns over nested conditions for better readability
 - [`prefer-promise-reject-errors`](./examples/prefer-promise-reject-errors.md) - Enforces Error objects in Promise.reject() calls
 - [`require-error-handling`](./examples/require-error-handling.md) - Ensures Deno file operations are properly awaited