Implemented a basic scanner

src/scanner/Scan.go

@@ -2,9 +2,23 @@ package scanner
 
 import (
 	"git.urbach.dev/cli/q/src/build"
+	"git.urbach.dev/cli/q/src/fs"
 )
 
 // Scan scans all the files included in the build.
-func Scan(b *build.Build) Result {
-	return Result{}
+func Scan(b *build.Build) (<-chan *fs.File, <-chan error) {
+	s := scanner{
+		files:  make(chan *fs.File),
+		errors: make(chan error),
+		build:  b,
+	}
+
+	go func() {
+		s.queue(b.Files...)
+		s.group.Wait()
+		close(s.files)
+		close(s.errors)
+	}()
+
+	return s.files, s.errors
 }