Added a check for unused imports

src/build/fs/File.go

@@ -4,7 +4,9 @@ import "git.akyoto.dev/cli/q/src/build/token"
 
 // File represents a single source file.
 type File struct {
-	Path   string
-	Bytes  []byte
-	Tokens token.List
+	Path    string
+	Package string
+	Bytes   []byte
+	Imports map[string]*Import
+	Tokens  token.List
 }

src/build/fs/Import.go

@@ -0,0 +1,11 @@
+package fs
+
+import "git.akyoto.dev/cli/q/src/build/token"
+
+// Import represents an import statement in a file.
+type Import struct {
+	Path     string
+	FullPath string
+	Position token.Position
+	Used     bool
+}