chore: convert dev server to webpack plugin

[rishabh3112]

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

For Bugs and Features; did you add new tests?

WIP

Motivation / Use-Case

Dev Server should be a plugin

Breaking Changes

Nope

Additional Info

N/A

[codecov]

Codecov Report

Merging #3850 (11be35c) into master (d8cc133) will decrease coverage by 0.12%.
The diff coverage is 100.00%.

❗ Current head 11be35c differs from pull request most recent head 85d443a. Consider uploading reports for the commit 85d443a to get more accurate results

@@            Coverage Diff             @@
##           master    #3850      +/-   ##
==========================================
- Coverage   92.87%   92.75%   -0.13%     
==========================================
  Files          14       14              
  Lines        1334     1338       +4     
  Branches      467      468       +1     
==========================================
+ Hits         1239     1241       +2     
- Misses         87       89       +2     
  Partials        8        8              

Impacted Files	Coverage Δ
lib/Server.js	93.67% <100.00%> (+0.02%)	⬆️
lib/servers/WebsocketServer.js	91.42% <0.00%> (-5.72%)	⬇️

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[rishabh3112]

@alexander-akait let me know if there any custom hooks required to be implemented here.

[rishabh3112]

We should enable watch before taping into watchRun hook.

[alexander-akait]

Yes, plugin should work only for webpack watch/webpack serve, but I am afraid it is so late to override fs, need think more about it

[rishabh3112]

ping @alexander-akait

[alexander-akait]

Yep, in my roadmap on the next week