Function setProp

setProp<T, P>(obj, path, value): T
Sets a value at a nested property path, creating intermediate objects as needed
Type Parameters
- T extends NestedObject
- P extends string
Parameters
- obj: T
  The object to set the property in
- path: P
  The dot-notation path to the property (e.g., 'user.name')
- value: any
  The value to set
Returns T
The modified object
Throws
Error if input validation fails

Example
```
const obj = { user: { name: 'Flavio Ever' } };
setProp(obj, 'user.name', 'Flavio'); // Updates name to 'Flavio'
setProp(obj, 'user.profile.social.twitter', '@flavioever'); // Creates nested objects automatically
setProp(obj, 'user.skills.0', 'JavaScript'); // Works with arrays
```
- Defined in props.ts:285