relax: Add 11 popular ollama model name regex patterns for provider routing

[shokrydev]

Description

Add regex patterns for 11 popular Ollama model families: ministral, devstral, nemotron, granite, glm, rnj, olmo, smollm, lfm, falcon, yi. This enables users to use these models via the standard model_id API.

Fixes #328

Out of provided PR case selection, closest to "feature" but @aksg87 refers to similar changes as "relax".

How Has This Been Tested?

$ python -c "from langextract.providers import router; from langextract import providers; providers.load_builtins_once(); cls = router.resolve('ministral-3:8b'); print(f'Resolved to: {cls.__name__}')"

> Resolved to: OllamaLanguageModel

Checklist:

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  and ran pylint over the affected code.

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