feat: add serveIndex icons

[jlguenego]

• 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?

Motivation / Use-Case

Breaking Changes

Additional Info

[jlguenego]

Related to Issue #2440

[jlguenego]

Folders now have icons in front of each file ;)

[codecov]

Codecov Report

Merging #2441 into master will increase coverage by 0.22%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #2441      +/-   ##
==========================================
+ Coverage   93.58%   93.81%   +0.22%     
==========================================
  Files          34       34              
  Lines        1309     1309              
  Branches      371      371              
==========================================
+ Hits         1225     1228       +3     
+ Misses         82       79       -3     
  Partials        2        2

Impacted Files	Coverage Δ
lib/Server.js	96.73% <50%> (+0.43%)	⬆️
client-src/default/utils/reloadApp.js	100% <0%> (+4.34%)	⬆️

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[jlguenego]

before this pull request, directory looked poor without icons:

[alexander-akait]

Thanks!