Roslyn analyzer for AM

[WhiteBlackGoose]

Started working on one (WIP)

• 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 AngouriMathException as their parent

[codecov-io]

Codecov Report

Merging #284 (46d1648) into master (a462a52) will increase coverage by 0.03%.
The diff coverage is 66.09%.

@@            Coverage Diff             @@
##           master     #284      +/-   ##
==========================================
+ Coverage   75.91%   75.94%   +0.03%     
==========================================
  Files         106      107       +1     
  Lines        8737     8748      +11     
  Branches     1475     1479       +4     
==========================================
+ Hits         6633     6644      +11     
+ Misses       1618     1617       -1     
- Partials      486      487       +1     

Impacted Files	Coverage Δ
AngouriMath/Core/Compilation/Compiler.cs	93.91% <0.00%> (ø)
AngouriMath/Core/Domains.Classes.cs	8.16% <ø> (ø)
AngouriMath/Core/Domains.cs	100.00% <ø> (+88.88%)	⬆️
.../Continuous/Entity.Continuous.AbsSignum.Classes.cs	88.88% <0.00%> (ø)
...nuous/Entity.Continuous.ArcTrigonometry.Classes.cs	88.88% <0.00%> (ø)
...y/Continuous/Entity.Continuous.Calculus.Classes.cs	86.11% <0.00%> (ø)
.../Entity/Continuous/Entity.Continuous.Definition.cs	56.41% <ø> (+2.56%)	⬆️
...ontinuous/Entity.Continuous.Exponential.Classes.cs	90.47% <0.00%> (ø)
.../Continuous/Entity.Continuous.Factorial.Classes.cs	90.90% <0.00%> (ø)
.../Continuous/Entity.Continuous.Operators.Classes.cs	94.28% <0.00%> (ø)
... and 40 more

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