feat(market): add index provider api

[simlecode]

关联的Issues (Related Issues)

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改动 (Proposed Changes)

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 存在兼容性问题（接口, 配置，数据，灰度），如果存在需要进行文档说明 / This PR has compatibility issues (API, Configuration, Data, GrayRelease), if so, need to be documented.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 47.12042% with 101 lines in your changes missing coverage. Please review.

Project coverage is 25%. Comparing base (da0560e) to head (09b0761).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #6382    +/-   ##
=======================================
  Coverage      25%     25%            
=======================================
  Files         676     679     +3     
  Lines       68027   68199   +172     
=======================================
+ Hits        17567   17650    +83     
- Misses      47656   47740    +84     
- Partials     2804    2809     +5