Add AVEVA ruleset minimum configuration

[quasarea]

What changed

• add central package management for Aveva.RulesetMinimum and Microsoft.CodeAnalysis.NetAnalyzers
• add a repo-wide Directory.Build.props to apply the ruleset package to C# projects
• copy the packaged Aveva.RulesetMinimum .editorconfig into the repo root

Why changed

• align the repository with the AVEVA minimum analyzer/ruleset baseline
• keep analyzer configuration sourced from the shipped package content

Traceability

• Work item: 4728594

Validation

• focused file validation in the local workspace for Directory.Build.props, Directory.Packages.props, and .editorconfig
• GitHub Actions PR validation pending

[quasarea]

PR Readiness Scorecard

• Traceability: 8.0/10
  • Work item referenced: 4728594
• Scope clarity: 8.5/10
  • Change is limited to ruleset/analyzer onboarding files
• Validation: 5.0/10
  • Local focused validation completed
  • GitHub Actions PR validation pending
• Risk: 7.5/10
  • Repo-wide analyzer onboarding may surface follow-up warnings in consumer environments
• Usefulness review: Keep
  • Keep the central package and build props onboarding
  • Keep the packaged root .editorconfig copy
  • Cut nothing at this stage unless CI shows a compatibility issue

Overall: 7.3/10
Status: pending CI

[quasarea]

PR Readiness Scorecard Update

• Traceability: 8.0/10
  • Work item referenced: 4728594
• Scope clarity: 8.5/10
  • Change remains limited to ruleset/analyzer onboarding files
• Validation: 9.0/10
  • GitHub Actions Run Tests completed successfully
  • Run: https://github.com/AVEVA/UnifiedEngineeringCustomizationFramework/actions/runs/25166077498
• Risk: 7.5/10
  • Repo-wide analyzer onboarding may still surface downstream warning cleanup later
• Usefulness review: Keep
  • Keep the central package and build props onboarding
  • Keep the packaged root .editorconfig copy
  • Cut nothing from the submitted scope

Overall: 8.3/10
Status: green

[quasarea]

Closing this PR because the change belongs in the internal Azure DevOps repository, not the public mirror.