Add missing init() to marketplace scripts

doc/marketplace-scripts/chat-overlay/source.js

@@ -131,6 +131,8 @@ function formatLines(messages, ctx, width) {
     return lines.slice(-MAX_LINES);
 }
 
+function init() { }
+
 function tick(context, state) {
     const { ctx, width, height, chatMessages } = context;
     if (!ctx) {

doc/marketplace-scripts/emote-combo/source.js

@@ -277,6 +277,8 @@ function drawCombo(context, state, combo, now) {
     ctx.fillText(`${combo.count} x Combo`, labelX, labelY);
 }
 
+function init() { }
+
 function tick(context, state) {
     const { chatMessages, emoteCatalog } = context;
     if (!context?.ctx) {

doc/marketplace-scripts/kirov-reporting/source.js

@@ -29,6 +29,8 @@ function resolveAttachmentId(assets, state) {
     return match.id;
 }
 
+function init() { }
+
 function tick(context, state) {
     const { chatMessages, assets, now, playAudio } = context;
     if (!Array.isArray(chatMessages) || chatMessages.length === 0) {