Jina AI Embedding model integration

[lucifer-Hell]

Context

This pr is for integration of jina ai embedding model which is mentioned in the issue 973

Change

1. Since no jina sdk was available for java hence built client for the same .
2. Added method of embedding generation for both single input and multiple inputs
3. Default model used jina-embeddings-v2-base-en

Checklist

Before submitting this PR, please check the following points:

• I have added unit and integration tests for my change
• All unit and integration tests in the module I have added/changed are green
• All unit and integration tests in the core and main modules are green
• I have added/updated the documentation
• I have added an example in the examples repo (only for "big" features)
• I have added my new module in the BOM (only when a new module is added)

Checklist for adding new embedding store integration

• I have added a {NameOfIntegration}EmbeddingStoreIT that extends from either EmbeddingStoreIT or EmbeddingStoreWithFilteringIT

[langchain4j]

@lucifer-Hell thank you a lot! I have left some comments, please check.

[lucifer-Hell]

thanks for reviewing @langchain4j i will do the changes and re-request for review .

[lucifer-Hell]

Hi @langchain4j i have fixed naming and version issues. Also changed the Junit version & removed the dependencies which were not required . Please review it once and let me know any further changes have to be done.
PS: I have re-ran all the test cases after the changes .