Refine Data Access using OpeaStore

[joshuayao]

Description

Improve the modularity, flexibility, and maintainability of the data access layer for the Chat History, Feedback Management, and Prompt Registry microservices using OpeaStore. Support MongoDB in this PR.

1. Porting the data access layer to OpeaStore: Migrating the existing code for data operations (like create, read, update, and delete) from the three microservices to use the OpeaStore. This ensures consistency and leverages the benefits of the shared data layer.
2. Adding OpeaStore tools: A store factory streamlines the creation of a connection for different databases and tools for resolving database differentiations like ODM.
3. Decoupling user data structures: Separating the application's data models from OpeaStore data layer implementations.
4. Adding a search by KV API: A Key-Value (KV) API is a more common way to retrieve data in data access layer. Separating the application's search logic from OpeaStore data layer implementations like "get doc of a specific user".
5. Updating documentation

Issues

#1578

Type of change

List the type of change like below. Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would break existing design and interface)
• Others (enhancement, documentation, validation, etc.)

[codecov]

Codecov Report

❌ Patch coverage is 17.89474% with 78 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
comps/cores/storages/stores.py	0.00%	57 Missing ⚠️
comps/cores/storages/mongodb.py	44.44%	20 Missing ⚠️
comps/cores/common/storage.py	50.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
comps/cores/common/storage.py	58.18% <50.00%> (-0.31%)	⬇️
comps/cores/storages/mongodb.py	51.65% <44.44%> (-11.87%)	⬇️
comps/cores/storages/stores.py	0.00% <0.00%> (ø)

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