Adds an embedding store for Azure Cosmos DB for NoSQL

[aayush3011]

Issue

This PR add supports for Azure Cosmos DB for NoSQL embedding store.

Change

• This PR adds an embedding store for Azure Cosmos DB for NoSql. The test cases and IT test case is also included.

General checklist

• There are no breaking changes
• I have added unit and integration tests for my change
• I have manually run all the unit and integration tests in the module I have added/changed, and they are all green
• I have manually run all the unit and integration tests in the core and main modules, and they are all green

• I have added/updated the documentation
• I have added an example in the examples repo (only for "big" features)

Checklist for adding new model integration

• I have added my new module in the BOM

Checklist for adding new embedding store integration

• I have added a {NameOfIntegration}EmbeddingStoreIT that extends from either EmbeddingStoreIT or EmbeddingStoreWithFilteringIT
• I have added my new module in the BOM

Checklist for changing existing embedding store integration

• I have manually verified that the {NameOfIntegration}EmbeddingStore works correctly with the data persisted using the latest released version of LangChain4j

[aayush3011]

@langchain4j, can you please review this PR as a priority. We need the changes to go in by this Friday. The azure-cosmos dependency will be released tomorrow morning, and I'll update the pom accordingly.

I am working adding the IT test.

[aayush3011]

@langchain4j any update.

[langchain4j]

Hi.
A few things:

1. please fill out the PR template, it exists for a reason.
2. please provide a reason why this PR should be prioritized over 70+ others?

[aayush3011]

@langchain4j I have updated the PR template. This PR is required for a demo and lab at Microsoft Build Conference happening next week.

The Azure CosmosDB Java SDK will be released this afternoon. I just wanted to get eyes on the PR, and make it ready so that as soon as the Java SDK is released publicly, we can get the PR in.

For now, I have tested this PR in local.

[aayush3011]

@langchain4j any update on this.

[langchain4j]

please double check which properties are needed only for creating database/container if it does not exists and which are needed for querying. I suspect some of these properties are not required once db/container are created

[aayush3011]

@langchain4j All these properties are required to create a container/database which can perform vector search. Only the path of the embedding path is required for querying.

I'm not sure what else do you want to me check here.

[langchain4j]

Can you implement it so that user does not have to provide all properties (see all the assertions for null/empty in the constructor) if the database/container are already in place?

[langchain4j]

@aayush3011 should I merge and release it as-is now or do you plan to address the comments?

[langchain4j]

@aayush3011 I will merge it now to not block the release, feel free to address comments in the separate PR. Thank you!