To tidy up __call__ in RouteLayer.

The test

TestRouteLayer::test_query_with_no_index

was failing because when it ran

assert route_layer("Anything").name is None

There were no Routes defined yet, and this meant that

route = [route for route in self.routes if route.name == top_class][0] was raising an error.

If no routes are defined then we can just defualt to RouteChoice().

Merge branch 'optimal_route_level_score_thresholds' of https://github.com/aurelio-labs/semantic-router into optimal_route_level_score_thresholds

Created a random_score_threshold_search method in TestRouteSelection for finding optimum score threshold values across all routes, using a random search algorithm.

Also created a fit method in RouteLayer for running the random_score_threshold_search and for

James/0018

feat: Return triggered flag in response

User inputted value was being overruled by hardcoded list.

feat: Added AzureOpenAILLM

Merge branch 'azure-dyn-route-fix' of https://github.com/arashaga/semantic-router into azure-dyn-route-fix

Merge branch 'azure-dyn-route-fix' of https://github.com/arashaga/semantic-router into azure-dyn-route-fix

chore: update README.md and add course

feat: Allow Pydantic V2+

chore: Update for version