Do not show completions inside comments

[miqm]

• Detecting if we're inside a comment by checking if current offset is in a SyntaxTrivia and that trivia is a comment type
• If so, do not try to build completions, as it's pointless - return BicepCompletionContextKind.None

Fixes #970
Fixes #576

[codecov-io]

Codecov Report

Merging #974 (75f8d55) into main (fa6e2c5) will increase coverage by 0.00%.
The diff coverage is 96.66%.

@@           Coverage Diff           @@
##             main     #974   +/-   ##
=======================================
  Coverage   94.33%   94.33%           
=======================================
  Files         316      317    +1     
  Lines       14771    14800   +29     
  Branches       12       12           
=======================================
+ Hits        13934    13962   +28     
- Misses        837      838    +1     

Flag	Coverage Δ
dotnet	94.93% <96.66%> (+<0.01%)	⬆️
typescript	25.78% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rc/Bicep.Core/Navigation/SyntaxTriviaExtensions.cs	94.44% <94.44%> (ø)
...ngServer.UnitTests/BicepCompletionProviderTests.cs	100.00% <100.00%> (ø)
...p.LangServer/Completions/BicepCompletionContext.cs	96.24% <100.00%> (+0.07%)	⬆️
src/Bicep.Core/Emit/ScopeHelper.cs	92.38% <0.00%> (ø)
src/Bicep.Core/Syntax/SyntaxTree.cs	100.00% <0.00%> (ø)
src/Bicep.Core/Emit/TemplateEmitter.cs	100.00% <0.00%> (ø)
src/Bicep.Core.UnitTests/Utils/ParserHelper.cs	100.00% <0.00%> (ø)
src/Bicep.Core/Syntax/ModuleDeclarationSyntax.cs	100.00% <0.00%> (ø)
src/Bicep.Core.UnitTests/Utils/TestSyntaxHelper.cs	100.00% <0.00%> (ø)
...ypeSystem/TypeValidatorCompileTimeConstantTests.cs	100.00% <0.00%> (ø)
... and 85 more

[majastrz]

Thanks for sending the fix for this!