Add faiss insert and search mixin

[Chiiizzzy]

Signed-off-by: Kaiyuan Hu [email protected]

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Chiiizzzy To complete the pull request process, please assign fzliu after the PR has been reviewed. You can assign the PR to them by writing /assign @fzliu in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[filip-halt]

Why are we creating mixins for this. Cant we use/modify https://towhee.io/tasks/detail/operator?field_name=ANN-Search&task_name=ANN-Search