feat(RAG): support knowledgeSpace custom retrieve strategy

[chenliang15405]

Description

Support knowledgeSpace custom retrieve strategy replace default retrieve mode

Close #2831

How Has This Been Tested?

step1: Enter the knowledge space management page
step2: Enter the "Arguments" management page
step3: select custom retrieve strategy
step4: use chat knowledge and select that knowledge space

Snapshots:

Checklist:

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[Aries-ckt]

hi, @chenliang15405 please fix the code conflict.

[Aries-ckt]

LGTM.

[Aries-ckt]

LGTM

[fangyinc]

LGTM

[Talos-shenzhen]

LGTM