Return all PowerShell query rows by default

[PrzemyslawKlys]

Summary

• make the SQL Server, PostgreSQL, Oracle, MySQL, SQLite, streaming, and stored-procedure PowerShell query commands default to PSObject
• return one normal PowerShell object per row for ordinary query invocations
• keep explicit -ReturnType DataRow, DataTable, and reader modes available
• canonicalize PowerShell-reserved PS* column aliases as Column_<name> and add numeric suffixes when needed, so unusual schemas do not drop query results
• refresh generated command documentation and MAML help to describe the default

Compatibility

This intentionally changes the default output shape from DataRow to PSObject. Scripts that require the legacy object type can continue to use -ReturnType DataRow (or -As DataRow) explicitly.

Ordinary SQL aliases are preserved. Because PowerShell reserves the PS* member namespace, a source alias such as PSObject is exposed as Column_PSObject; if that name already exists, DbaClientX selects the next numeric suffix without hiding either value.

Validation

• full .NET 8 suite: 1,225 passed
• focused converter contracts: 5/5 on .NET 8 and 5/5 on .NET 10
• full PowerShell 7 suite: 228 passed
• full Windows PowerShell 5.1 suite: 219 passed, 9 expected platform skips
• packaged SQLite query returned both rows as PSCustomObject values in PowerShell 7 and Windows PowerShell 5.1
• generated Markdown and MAML help are synchronized with the public default

[codecov]

Codecov Report

❌ Patch coverage is 93.93939% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.27%. Comparing base (796b3f8) to head (273c65d).

Files with missing lines	Patch %	Lines
DbaClientX.PowerShell/PSObjectConverter.cs	92.30%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #227      +/-   ##
==========================================
+ Coverage   53.08%   53.27%   +0.18%     
==========================================
  Files         261      261              
  Lines       19727    19740      +13     
  Branches     3414     3415       +1     
==========================================
+ Hits        10472    10516      +44     
+ Misses       8239     8209      -30     
+ Partials     1016     1015       -1     

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