Alter .gitignore to ignore and allow the appropriate values

.gitignore

@@ -413,16 +413,17 @@ FodyWeavers.xsd
 *.vsix
 
 #ignore all in root folder except the allowed values
-./**
+/*
-!./.editorconfig
+!.editorconfig
-!./.gitignore
+!.gitignore
-!./LICENSE
+!LICENSE
-!./README.mdf
+!README.mdf
-!./*.[Ss][Ll][Nn]
+!*.[Ss][Ll][Nn]
-!./.gitea/**
+!/.gitea
-!./build/**
+!/build
-!./docs/**
+!/docs
-!./examples/**
+!/examples
-!./src/**
+!/src
-!./tests/**
+!/tests
-!./tools/**
+!/tools
+!/*.[Ss][Ll][Nn]