feat(component): add Ollama LLM and Embedding providers

[Timelovers]

Description

Add OllamaProvider (LLM) and OllamaEmbeddingProvider (embedding) — thin subclasses of the existing OpenAI-compatible providers with Ollama-specific defaults.

Ollama exposes an OpenAI-compatible API at http://localhost:11434/v1 with api-key: ollama. These providers extend the existing implementations so users get sensible local-first defaults out of the box — no need to remember the base URL or supply a dummy key.

from everos.component.llm import OllamaProvider
llm = OllamaProvider(model="llama3.1")

from everos.component.embedding import OllamaEmbeddingProvider
embed = OllamaEmbeddingProvider(model="nomic-embed-text")

The existing OpenAIProvider / OpenAIEmbeddingProvider already work with Ollama via .env config — this PR just makes the setup explicit and discoverable with zero new logic.

Type of Change

• New feature (non-breaking change that adds functionality)

How Has This Been Tested?

• Unit Test — 8 tests covering defaults, custom params, inheritance, and public imports
• Syntax check — all files pass ast.parse()

Checklist

• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• I have created related documentation issue/PR (if applicable)
• New and existing unit tests pass locally with make test

Related Issues

N/A — incremental addition following the existing one-provider-per-file pattern.

[Timelovers]

Hi — just checking if this is on the radar. Happy to adjust anything if needed. Thanks!