Static analyzer for development #283

Alright I feel like we finally need an analyzer for AngouriMath. It would include

• Get back the vsix for debuggability

Tasks for the analyzer

• Producing warnings/errors for static non-readonly fields without [ThreadStatic]
• Producing warnings/errors for thread static fields which have the default initialization
• Producing warnings/errors for private fields of records without Equals overriden
• Producing warnings for records which are neither sealed nor abstract
• Producing warnings for public static classes that are outside of MathS
• Producing warnings for records which are derived of Entity but don't have ToString overriden
• Producing warnings for thrown exceptions which don't have AngouriMathBaseException as their parent