Codestyle Package Regeln erweitern

[afuersch]

• Naming conventions prüfen https://learn.microsoft.com/en-us/dotnet/standard/design-guidelines/naming-guidelines
  z.B. PascalCase von Methoden, Properties
  https://learn.microsoft.com/en-gb/dotnet/fundamentals/code-analysis/style-rules/naming-rules#rule-id-ide1006-naming-rule-violation
• Keine public Instance Fields https://learn.microsoft.com/en-us/dotnet/standard/design-guidelines/field
• Format of razor/HTML files