Function exception2Result

exception2Result<FN extends () => T | Promise<T>, T>(
fn: FN,
): WithResult<ReturnType<FN>>
Wraps a function to convert thrown exceptions into Result.Err values.

Executes the provided function and returns Result.Ok on success or Result.Err on thrown exceptions. Supports both synchronous and asynchronous functions.
Type Parameters
- FN extends () => T | Promise<T>
  Function type that returns T or Promise
- T
  The return type of the function
Parameters
- fn: FN
  Function to execute with exception handling
Returns WithResult<ReturnType<FN>>
Result for sync functions, Promise<Result> for async functions
Example
```
const result = exception2Result(() => {
  return JSON.parse('invalid json');
});
// result is Result.Err with parse error

const asyncResult = await exception2Result(async () => {
  return await fetch('/api/data');
});
```
- Defined in result.ts:148