Re-wrote from scratch in Golang

- Re-implemented the project in Golang, and deprecated Python entirely
- Implemented several new, long-requested features
- Refactored cheatsheets into a separate repository

internal/cheatpath/writeable.go

@@ -0,0 +1,24 @@
+package cheatpath
+
+import (
+	"fmt"
+)
+
+// Writeable returns a writeable Cheatpath
+func Writeable(cheatpaths []Cheatpath) (Cheatpath, error) {
+
+	// iterate backwards over the cheatpaths
+	// NB: we're going backwards because we assume that the most "local"
+	// cheatpath will be specified last in the configs
+	for i := len(cheatpaths) - 1; i >= 0; i-- {
+
+		// if the cheatpath is not read-only, it is writeable, and thus returned
+		if cheatpaths[i].ReadOnly == false {
+			return cheatpaths[i], nil
+		}
+
+	}
+
+	// otherwise, return an error
+	return Cheatpath{}, fmt.Errorf("no writeable cheatpaths found")
+}