Fix bite sized regex in Check.ps1 (#3)

Check.ps1 uses bite sized to check the line lengths in the generated
code. The call excludes any lines containing regexes. However, the regex
used for this exception does not account for interpolated strings.
Hence, we extend the regex accordingly.

Note: this deliberately does not account for all possibilities to define
strings in C#. Currently, the code only contains "plain" strings and
interpolated strings.)

Author: empwilli

src/Check.ps1

@@ -28,7 +28,7 @@ function Main
         --inputs "AasCore.*/*.cs" `
         --max-line-length 200 `
         --max-lines-in-file 100000 `
-        --ignore-lines-matching '^ +var [a-zA-Z0-9_]+ = ".+";'
+        --ignore-lines-matching '^ +var [a-zA-Z0-9_]+ = \$?".+";'
 
     Write-Host "${nl}Check.ps1: Inspecting the code with opinionated-usings...${nl}"
     dotnet opinionated-usings --inputs "AasCore.*/*.cs"