[FEATURE] Support TimeDelta Type (Python and Rust)

[badmonster0]

Here are all the dataType supported in CocoIndex: https://cocoindex.io/docs/core/data_types

We want to add TimeDelta Type, following #217

See

• timedelta in Python
• interval in postgres
• TimeDelta in Rust

[lemorage]

I will continue on this unmerged PR