v0.6.0 of modular_api_sqlserver

Official MACSS SQL Server integration package for Dart. Changelog excerpt: - add typed command parameters via DbParameter(name, value, direction input/output/inputOutput, free-form typeHint) with input/output/inputOutputhelpers - add DbCommandKind.procedurefor stored-procedure execution (the adapter maps it to EXEC/CALL; rows via query, no-rows via execute) - add optional DbProcedureOutcome(returnValue, outputParameters) on DbRowSetand DbExecutionSummary - extend shared-fixture conformance coverage for the new contracts across the three SDKs - add[...]