feat(conf): add global config provider

[ngjaying]

Let foreign modules/plugins have the chance to access runtime configurations

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.52%. Comparing base (85d026f) to head (ea1867a).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3942      +/-   ##
==========================================
- Coverage   71.53%   71.52%   -0.01%     
==========================================
  Files         454      455       +1     
  Lines       52300    52308       +8     
==========================================
+ Hits        37412    37413       +1     
- Misses      11975    11978       +3     
- Partials     2913     2917       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.