Add AI instructions for SqlServerDsc project with detailed guidelines and usage priorities

Author: johlju

.github/copilot-instructions.md

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+# AI Instructions for SqlServerDsc
+
+This file provides AI agent guidance for the SqlServerDsc project. Each instruction file below targets specific file glob patterns and use cases.
+
+## Instruction File Reference
+
+- Always check file patterns to determine applicable instructions
+- SqlServerDsc-specific rules override general DSC Community guidelines
+- Maintain localization requirements across all source files
+- Follow test patterns strictly for maintainability
+
+## Usage Priority
+
+1. [SqlServerDsc Guidelines](instructions/SqlServerDsc-guidelines.instructions.md) - Always apply first for SqlServerDsc-specific requirements
+2. **File-type specific guidelines** - Apply based on glob pattern and type
+3. **General guidelines** - Apply as baseline for all files
+
+### Core Project Guidelines
+
+- [SqlServerDsc Guidelines](instructions/SqlServerDsc-guidelines.instructions.md) (`**/*.psm1,**/*.psd1,**/*.ps1`)
+  - SqlServerDsc-specific rules: public command naming (SqlDsc prefix), SQL Server Management Objects (SMO) preference, integration test environments
+  - Use for: All PowerShell files requiring SqlServerDsc-specific patterns
+
+- [DSC Community Style Guidelines](instructions/dsc-community-style-guidelines.instructions.md) (`**`)
+  - Project-level guidelines: build scripts, testing, localization requirements
+  - Use for: General project structure and workflow guidance
+
+### PowerShell Code Guidelines
+
+- [DSC Community Style Guidelines - PowerShell](instructions/dsc-community-style-guidelines-powershell.instructions.md) (`**/*.psm1,**/*.psd1,**/*.ps1`)
+  - Core PowerShell style: naming conventions, formatting, indentation, braces, quotes
+  - Use for: All PowerShell code formatting and style
+
+### DSC Resource Guidelines
+
+- [DSC Community Style Guidelines - Class Resource](instructions/dsc-community-style-guidelines-class-resource.instructions.md) (`source/[cC]lasses/**/*.ps1`)
+  - Class-based DSC resources: inheritance patterns, method overrides, ResourceBase usage
+  - Use for: Files in source/Classes/ decorated with `[DscResource(...)]`
+
+- [DSC Community Style Guidelines - MOF Resources](instructions/dsc-community-style-guidelines-mof-resources.instructions.md) (`source/DSCResources/**/*.psm1`)
+  - MOF-based DSC resources: required functions, return types, error handling
+  - Use for: Traditional DSC resources in source/DSCResources/
+
+### Localization Guidelines
+
+- [DSC Community Style Guidelines - Localization](instructions/dsc-community-style-guidelines-localization.instructions.md) (`source/**/*.ps1`)
+  - General localization requirements for all source files
+  - Use for: Any source file requiring localized strings
+
+- [DSC Community Style Guidelines - Command Localization](instructions/dsc-community-style-guidelines-command-localization.instructions.md) (`source/[pP]ublic/**/*.ps1,source/[pP]rivate/**/*.ps1`)
+  - Command-specific localization: string key naming, SqlServerDsc.strings.psd1 usage
+  - Use for: Public commands and private functions
+
+- [DSC Community Style Guidelines - MOF Resource Localization](instructions/dsc-community-style-guidelines-mof-resource-localization.instructions.md) (`source/DSCResources/**/*.psm1,source/DSCResources/**/*.strings.psd1`)
+  - MOF resource localization: file structure, string ID format, usage patterns
+  - Use for: Traditional DSC resource localization files
+
+### Test Guidelines
+
+- [DSC Community Style Guidelines - Tests](instructions/dsc-community-style-guidelines-tests.instructions.md) (`tests/**/*.[Tt]ests.ps1`)
+  - General test patterns: Pester v5 syntax, Describe/Context/It structure, formatting
+  - Use for: All test files
+
+- [DSC Community Style Guidelines - Command Unit Tests](instructions/dsc-community-style-guidelines-command-unit-tests.instructions.md) (`tests/[uU]nit/[pP]ublic/**/*.[tT]ests.ps1,tests/[uU]nit/[pP]rivate/**/*.[tT]ests.ps1`)
+  - Unit test specifics: parameter validation, mocking patterns, coverage requirements
+  - Use for: Unit tests for public commands and private functions
+
+- [DSC Community Style Guidelines - Command Integration Tests](instructions/dsc-community-style-guidelines-command-integration-tests.instructions.md) (`tests/[iI]ntegration/[cC]ommands/**/*.[iI]ntegration.[tT]ests.ps1`)
+  - Integration test patterns: environment setup, real testing, naming conventions
+  - Use for: Integration tests for public commands
+
+### Documentation Guidelines
+
+- [DSC Community Style Guidelines - Changelog](instructions/dsc-community-style-guidelines-changelog.instructions.md) (`CHANGELOG.md`)
+  - Changelog format: keepachangelog format, issue references, concrete descriptions
+  - Use for: CHANGELOG.md updates
+
+- [DSC Community Style Guidelines - Markdown](instructions/dsc-community-style-guidelines-markdown.instructions.md) (`**/*.md`)
+  - Markdown formatting: line wrapping (80 chars), indentation (2 spaces)
+  - Use for: All Markdown documentation