basic logic of highlight.

include/AST/ParsedAST.h

@@ -5,6 +5,7 @@
 namespace clice {
 
 struct ParsedAST {
+    clang::FileManager& fm;
     clang::Preprocessor& pp;
     clang::SourceManager& sm;
     clang::ASTContext& context;

include/Feature/SemanticTokens.h

@@ -0,0 +1,3 @@
+#pragma once
+
+namespace clice::feature {}