Spring-ai Auto-configuration and starter for Ollama

Adds auto-configuration and a starter for Ollama.

Resolves #68

Comment From: shakuzen

I've rebased on the latest main but I'm getting errors in the tests of Transformers Embedding, which I haven't touched with my changes, so I don't think the failures are related. Does CI not run against pull requests?

Comment From: tzolov

Hi @shakuzen , thank you for the contribution. I will have a look shortly. Can you share the Transformers Embedding error and what OS are running on?

Comment From: tzolov

Rebased, squashed and merged at 6bdea65cd50759249db509fbaa3f5393be741f95

Comment From: shakuzen

Can you share the Transformers Embedding error and what OS are running on?

I'm on an apple silicon MBP.

[ERROR] Failures: 
[ERROR]   TransformersEmbeddingClientTests.embed:38 
expected: -0.19744634628295898
 but was: -0.19744601845741272
[ERROR]   TransformersEmbeddingClientTests.embedDocument:48 
expected: -0.19744634628295898
 but was: -0.19744601845741272
[ERROR]   TransformersEmbeddingClientTests.embedForResponse:78 
expected: -0.19744634628295898
 but was: -0.19744601845741272
[ERROR]   TransformersEmbeddingClientTests.embedList:59 
expected: -0.19744634628295898
 but was: -0.19744601845741272
[INFO] 
[ERROR] Tests run: 9, Failures: 4, Errors: 0, Skipped: 0

Comment From: tzolov

thanks @shakuzen , Apparently, there is a rounding discrepancy, after the 6th digit, for the different platforms.
Have to adjust the tests