chore: use primitives instead of typing imports and fixes completion …

[codefromthecrypt]

…signature

This migrates from typing imports to primitives per the following feedback from @lamchau:

:nit: i think our patterns here don't realize as of python 3.9+ we generally don't need Dict, List, and Tuple anymore we can use the primitives (dict, list, and tuple respectively)

This also fixes inconsistency in our provider completion signature with regards to:

• tools: more precisely allow any amount of tools as often there are none

• tools: Tuple[Tool] = field(factory=tuple, converter=tuple)

• tools: tuple[Tool, ...] = field(factory=tuple, converter=tuple)

• kwargs: providers were inconsistent on accepting this, which could lead to small bugs

-        messages: List[Message],
-        tools: Tuple[Tool],
-    ) -> Tuple[Message, Usage]:
+        messages: list[Message],
+        tools: tuple[Tool, ...],
+        **kwargs: dict[str, any],
+    ) -> tuple[Message, Usage]:

[lamchau]

lgtm!