fix: support non-coroutine awaitables in run_in_loop

[JasperSui]

Support Non-Coroutine Awaitables in run_in_loop

Problem

The run_in_loop method previously only properly handled coroutines and futures, but not other awaitable objects like those returned by asyncio.gather(). This caused issues when trying to run gathered tasks in a background thread loop.

#100

Solution

• Changed the parameter type from Coroutine[Any, Any, T] | asyncio.Future[T] to the more general Awaitable[T]
• Added logic to detect if the awaitable is a coroutine, and if not, wrap it in a coroutine function
• This allows run_in_loop to properly handle any awaitable object, including those returned by asyncio.gather()

Testing

• Added specific tests for using run_in_loop with asyncio.gather()
• Added a test for run_coroutine_sync with asyncio.gather()

Impact

This change maintains backward compatibility while extending functionality to support more awaitable types, making the library more flexible for various async patterns.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (b916643) to head (9b9047a).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #101   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            9         9           
  Lines          262       265    +3     
  Branches        28        28           
=========================================
+ Hits           262       265    +3     

Files with missing lines	Coverage Δ
src/fastapi_injectable/concurrency.py	100.00% <100.00%> (ø)

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