Apply build-in code formatters

[filzrev]

This PR apply following build-in code formatters. (styles are defined on .editorconfig settings)

1. Fix whitespaces with dotnet format whitespace command (f1dfc9d)
2. Fix styles with dotnet format style command (3076cc1)

Purpose of this PR
Avoid formatting related diff occurred when creating PR.

[codecov]

Codecov Report

Patch coverage: 77.77% and project coverage change: +0.01 🎉

Comparison is base (c0b8541) 77.04% compared to head (3076cc1) 77.05%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8912      +/-   ##
==========================================
+ Coverage   77.04%   77.05%   +0.01%     
==========================================
  Files         605      605              
  Lines       25040    25038       -2     
==========================================
+ Hits        19293    19294       +1     
+ Misses       5747     5744       -3     

Impacted Files	Coverage Δ
...crosoft.DocAsCode.App/Config/ContentPairingInfo.cs	0.00% <ø> (ø)
...soft.DocAsCode.App/Config/FileMetadataPairsItem.cs	100.00% <ø> (ø)
...Code.App/Config/ListWithStringFallbackConverter.cs	40.00% <0.00%> (ø)
...soft.DocAsCode.App/Config/WkhtmltopdfJsonConfig.cs	0.00% <ø> (ø)
src/Microsoft.DocAsCode.App/Docset.cs	100.00% <ø> (ø)
.../Microsoft.DocAsCode.App/Helpers/MetadataMerger.cs	0.00% <ø> (ø)
src/Microsoft.DocAsCode.App/RunPdf.cs	0.00% <0.00%> (ø)
...buteHandlers/Handlers/BaseModelAttributeHandler.cs	89.65% <ø> (ø)
...e.Build.Common/Reference/ApplyOverwriteDocument.cs	94.04% <ø> (ø)
...e.Build.Common/Reference/OverwriteDocumentModel.cs	100.00% <ø> (ø)
... and 159 more

... and 2 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[yufeih]

Looks great!

Did you manually run these commands before checkin?

[filzrev]

Looks great!

Did you manually run these commands before checkin?

Yes. I executed commands manually.
It would be appreciated if it is automatically correct & enforce the formatting on the CI side.