Function resolveExclusion

resolveExclusion(
    exclude: undefined | boolean,
    excludeOff: undefined | true,
    defaultValue: undefined | boolean,
): undefined | true
Resolve a tri-state optional boolean flag under exactOptionalPropertyTypes.
- If the user explicitly enabled the flag, return true.
- If the user explicitly disabled (the "...-off" variant), return undefined (unset).
- Otherwise, adopt the default (true → set; false/undefined → unset).
Parameters
- exclude: undefined | boolean
  The "on" flag value as parsed by Commander.
- excludeOff: undefined | true
  The "off" toggle (present when specified) as parsed by Commander.
- defaultValue: undefined | boolean
  The generator default to adopt when no explicit toggle is present.
Returns undefined | true
boolean | undefined — use undefined to indicate "unset" (do not emit).
Example
```
resolveExclusion(undefined, undefined, true); // => true
```
- Defined in src/cliCore/flagUtils.ts:17