Add semantic kernel vector store approaches

[milderhc]

Purpose

• Adding vector store functionality to the Ask and Chat sections. Using hybrid search + semantic ranker, query captions are not available as the semantic kernel maps the documents and returns them without that extra info.
• Updated Azure AI Search SDK version

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information

[dantelmomsft]

not required. we can delete this

[milderhc]

I still use these variables. The embedding generation service and chat completion service in SK need their models as input.

[dantelmomsft]

I think this is a duplication. let's use SK ChatHistory we have in conversation variable at line 72

[milderhc]

Not in this case, ChatGPTUtils.formatAsChatML receives a list of List<ChatRequestMessage> which is not available from the ChatHistory. ChatHistory has List<ChatMessageTextContent>.