chore: Enforce coding styles on build (#242)

## This PR
A follow on from the previous PR that removed unused using, this will
make sure it won't occur in the future.
#240 (comment)

- Enforce code styles on build
- Error on unused usings
- Apply workaround for IDE0005 rule

### Related Issues
Fixes
#240 (comment)

Signed-off-by: Benjamin Evenson <2031163+benjiro@users.noreply.github.com>
Co-authored-by: Todd Baert <todd.baert@dynatrace.com>

.editorconfig

@@ -140,14 +140,13 @@ dotnet_diagnostic.IDE0001.severity = warning
 dotnet_diagnostic.IDE0002.severity = warning
 
 # IDE0005: Remove unnecessary import
-# Workaround for https://github.com/dotnet/roslyn/issues/41640
-dotnet_diagnostic.IDE0005.severity = none
+dotnet_diagnostic.IDE0005.severity = error
 
 # RS0041: Public members should not use oblivious types
 dotnet_diagnostic.RS0041.severity = suggestion
 
 # CA2007: Do not directly await a Task
-dotnet_diagnostic.CA2007.severity = error
+dotnet_diagnostic.CA2007.severity = errorgit 
 
 [obj/**.cs]
 generated_code = true

build/Common.props

@@ -3,6 +3,9 @@
     <LangVersion>latest</LangVersion>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
     <EnableNETAnalyzers>true</EnableNETAnalyzers>
+    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+    <!-- Workaround for IDE0005 (Remove unnecessary usings/imports); see https://github.com/dotnet/roslyn/issues/41640 -->
+    <NoWarn>EnableGenerateDocumentationFile</NoWarn>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)'=='Debug'">