feat: improve error and warning messages in overlay

[snitin315]

• [ ] This is a bugfix
• [x] This is a feature
• [ ] This is a code refactor
• [x] This is a test update
• [ ] This is a docs update
• [ ] This is a metadata update

For Bugs and Features; did you add new tests?

Motivation / Use-Case

Refers https://github.com/webpack/webpack-dev-server/issues/3689

improve error and warning messages in overlay.

Breaking Changes

None

Additional Info

No

[codecov[bot]]

Codecov Report

Merging #4087 (3d8c2d4) into master (eea50f3) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4087   +/-   ##
=======================================
  Coverage   92.27%   92.27%           
=======================================
  Files          16       16           
  Lines        1593     1593           
  Branches      596      596           
=======================================
  Hits         1470     1470           
  Misses        114      114           
  Partials        9        9           

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[snitin315]

Looks good, let's add more tests

yes, WIP on tests

[snitin315]

Yes, can you suggest some test cases?