PraseTja: Add branches

- Needs the following changes to the database: change `easy`, `normal`, `hard`, and `oni` to `TEXT` type
- When adding songs to the database and if, for example, a song's 7-star difficulty has a branch, instead of `7` input `7 B`, this is to display song's branch support on the song selection
- Branch can be forced in debug

public/src/views/debug.html

@@ -9,6 +9,17 @@
 	<div class="measure-num input-slider">
 		<span class="reset">x</span><input type="text" value="" readonly><span class="minus">-</span><span class="plus">+</span>
 	</div>
+	<div class="branch-hide">
+		<div>Branch:</div>
+		<div class="branch-select select">
+			<span class="reset">x</span><select>
+				<option value="auto" selected>Auto</option>
+				<option value="normal">Normal</option>
+				<option value="advanced">Advanced</option>
+				<option value="master">Master</option>
+			</select>
+		</div>
+	</div>
 	<label><input class="change-restart" type="checkbox">Restart on change</label>
 	<label class="autoplay-label"><input class="autoplay" type="checkbox">Auto play</label>
 	<div class="bottom-btns">