refactor(.github,README,gateway,plugins/fileloader,tests,types)!: make intent calculation manual

This changes the calculation of intents to be manual to the dev.
This is to improve overall consistency of our code base, also it is not a big drawback for users since intents are usually done once and then never (seldom) touched again.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -22,9 +22,7 @@ const bot = createBot({
   events: {
     // ADD EVENTS NEEDED TO SHOW THE BUG HERE
   },
-  intents: [
-    // ADD INTENTS NEEDED HERE FOR YOUR TEST
-  ],
+  intents: 0, // ADD INTENTS NEEDED HERE FOR YOUR TEST IF NECESSARY
 });
 
 await startBot(bot);