make keybinds configurable and consolidate

text_editor_test.go

@@ -16,6 +16,21 @@ type memoryTextClipboard struct {
 	writeErr error
 }
 
+func TestVimEditorUsesSharedConfiguredNavigation(t *testing.T) {
+	editor := newTextEditor("first\nsecond", true)
+	editor.keys.Navigation.Down = []string{"ctrl+j"}
+	editor.keys.Navigation.Up = []string{"ctrl+k"}
+
+	editor.handleKey(runeKey("j"), true)
+	if editor.Cursor != 0 {
+		t.Fatalf("removed default j moved cursor to %d", editor.Cursor)
+	}
+	editor.handleKey(tea.KeyMsg{Type: tea.KeyCtrlJ}, true)
+	if editor.Cursor != len([]rune("first\n")) {
+		t.Fatalf("configured ctrl+j moved cursor to %d", editor.Cursor)
+	}
+}
+
 func (c *memoryTextClipboard) ReadText() (string, error) {
 	return c.text, c.readErr
 }