Organize directories and minor improvements for consistency and trivial fixes

[kabirbaidhya]

Minor Fixes

• Move SYNC_DB_CLI declaration to the beginning of the CLI execution to avoid potential confusion.
• Fix an issue for run-dev.sh, it didn't work with user provided command line flags such as ./bin/run-dev.sh --version wouldn't work as it wouldn't pass args to the main script -- fixed.

Improvements for consistency

• Organize directories - prefer singular directories to maintain consistency everywhere.
• Organize test directories - there weren't any.
• Make test labels consistent.

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The tests look consistent and clean now.

[codecov-io]

Codecov Report

Merging #57 into master will increase coverage by 0.56%.
The diff coverage is 40.00%.

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
+ Coverage   38.18%   38.75%   +0.56%     
==========================================
  Files          19       19              
  Lines         364      369       +5     
  Branches       32       32              
==========================================
+ Hits          139      143       +4     
- Misses        223      224       +1     
  Partials        2        2              

Impacted Files	Coverage Δ
src/SyncDb.ts	0.00% <ø> (ø)
src/api.ts	0.00% <0.00%> (ø)
src/enum/DatabaseObjectTypes.ts	100.00% <ø> (ø)
src/service/configInjection.ts	40.62% <ø> (ø)
src/service/execution.ts	100.00% <ø> (ø)
src/service/sync.ts	0.00% <0.00%> (ø)
src/config.ts	53.84% <50.00%> (+1.67%)	⬆️
src/service/sqlRunner.ts	61.36% <100.00%> (ø)

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[kabirbaidhya]

Merging this as these are few trivial fixes and path changes / aesthetics. There is other PR which requires review and thoughts -> #58.