Function formatIssuePath

formatIssuePath(path: readonly (string | number)[]): string
Renders a DecodingIssue path as a human-readable location string.

Object keys are joined with dots, while array indices use bracket notation, matching the convention developers expect from JSON paths.
Parameters
- path: readonly (string | number)[]
  The structured path from the decoded root to the failing field.
Returns string
The location string (empty for a root-level issue).
Example
```
formatIssuePath(['user', 'name']); // 'user.name'
formatIssuePath(['user', 'roles', 1]); // 'user.roles[1]'
formatIssuePath([0, 'email']); // '[0].email'
```