feat: create new optional SQL Backend Service package

[ghiscoding]

this will potentially (hopefully) be useful for the MSSQL VScode extension

[codecov]

Codecov Report

❌ Patch coverage is 99.71910% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 100.0%. Comparing base (5b9b288) to head (b21aa6b).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/sql-backend/src/services/sql.service.ts	99.8%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #2504     +/-   ##
=========================================
- Coverage   100.0%   100.0%   -0.0%     
=========================================
  Files         195      196      +1     
  Lines       24393    24747    +354     
  Branches     8574     8740    +166     
=========================================
+ Hits        24393    24746    +353     
- Misses          0        1      +1     

Flag	Coverage Δ
angular	100.0% <100.0%> (ø)
universal	100.0% <99.8%> (-<0.1%)	⬇️

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commit: b21aa6b