Refactor for better modularity (share more code among edit functions, rename "offline" package to "backend"

src/backend/1globals.go

@@ -0,0 +1,16 @@
+package backend
+
+import (
+	"os"
+)
+
+// global variables used across multiple files
+var (
+	home, _ = os.UserHomeDir()
+)
+
+// global constants used across multiple files
+const (
+	AnsiError = "\033[38;5;9m"
+	AnsiReset = "\033[0m"
+)