Download REST API endpoints (#72)

* backend and frontend hotfixes, see message

Improved rendering on the frontend by cutting unecessary useStates.
Backend side, downloads now auto resume even on application kill.

* download rest api endpoints, general code refactor

* download request json mappings

server/cli/ascii.go

@@ -1,7 +1,5 @@
 package cli
 
-import "fmt"
-
 const (
 	// FG
 	Red     = "\033[31m"
@@ -12,12 +10,8 @@ const (
 	Cyan    = "\033[36m"
 	Reset   = "\033[0m"
 	// BG
-	BgRed   = "\033[1;41m"
-	BgBlue  = "\033[1;44m"
-	BgGreen = "\033[1;42m"
+	BgRed     = "\033[1;41m"
+	BgBlue    = "\033[1;44m"
+	BgGreen   = "\033[1;42m"
+	BgMagenta = "\033[1;45m"
 )
-
-// Formats a message with the specified ascii escape code, then reset.
-func Format(message string, code string) string {
-	return fmt.Sprintf("%s%s%s", code, message, Reset)
-}