feat: add bootstrap

[simlecode]

关联的Issues (Related Issues)

close #6080

改动 (Proposed Changes)

"swarm": {
  "address": "/ip4/0.0.0.0/tcp/0",
  "protectedPeers": null,
  "connMgrLow": 150,
  "connMgrHigh": 180,
  "connMgrGrace": "20s"
},

"pubsub": {
  "bootstrapper": false
}

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

Merging #6084 (3ba64e9) into master (643bb04) will increase coverage by 0%.
The diff coverage is 47%.

❗ Current head 3ba64e9 differs from pull request most recent head 179b2e5. Consider uploading reports for the commit 179b2e5 to get more accurate results

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #6084   +/-   ##
======================================
  Coverage      24%     24%           
======================================
  Files         662     662           
  Lines       80270   80317   +47     
======================================
+ Hits        19665   19694   +29     
- Misses      58000   58015   +15     
- Partials     2605    2608    +3     

[LinZexiao]

LGTM