[FEA]: Identity matrix

Is this a new feature, an improvement, or a change to existing functionality?

New Feature

How would you describe the priority of this feature request?

Critical (currently preventing usage)

Please provide a clear description of problem this feature solves

Have trouble solving small linear systems using iterative methods without the support of creating identity matrix(tile).

Feature Description

Need a way to create identity tile (1s on the diagonal, 0s elsewhere).
It will be great if diag is also supported.

Describe your ideal solution

Proposed API would be:

ct.identity(4, dtype=ct.float32)
# returns Tile[float32, (4, 4)]

# for any tile `values` with type Tile[float32, (8)]
ct.diag(values)
# returns Tile[float32, (8, 8)]

Describe any alternatives you have considered

No response

Additional context

No response

Contributing Guidelines

• I agree to follow cuTile Python's contributing guidelines
• I have searched the open feature requests and have found no duplicates for this feature request

Inizia esaminando la cuTile Python API e le linee guida per i contributi, quindi confronta le firme proposte di ct.identity e ct.diag con le API pubbliche esistenti. Il lavoro è completato quando entrambe le operazioni sono disponibili con le forme dei tile e il comportamento di dtype richiesti, con una copertura per gli esempi descritti nell’issue.