Create file_watcher_EVT.js (#1029)

* Create file_watcher_EVT.js

Simple file watch event. Triggers when a file is created in a dir. 

I had a use, Someone else might hence why i'm requesting a merg.

* Update file_watcher_EVT.js

events/file_watcher_EVT.js

@@ -0,0 +1,58 @@
+module.exports = {
+  name: 'File Watcher',
+  displayName: 'File Watch Event',
+  isEvent: true,
+
+  fields: ['Directory to Watch (Relative to bot directory)', 'Variable Name for Filename'],
+
+  mod(DBM) {
+    const { Bot, Actions } = DBM;
+    const fs = require('fs');
+    const path = require('path');
+    DBM.Events = DBM.Events || {};
+    const fileWatcher = {};
+    DBM.Events.fileWatcher = {};
+    fileWatcher.watchers = {};
+
+    fileWatcher.setupWatchers = function setupWatchers() {
+      if (!Bot.$evts['File Watcher']) return;
+
+      for (const event of Bot.$evts['File Watcher']) {
+        try {
+          if (!event.temp || !event.temp2) return;
+          const eventName = event.name;
+          const watchDir = path.resolve(__dirname, '..', event.temp);
+          const variableName = event.temp2;
+
+          const watcher = fs.watch(watchDir, (eventType, filename) => {
+            if (eventType === 'rename' && filename) {
+              const filePath = path.join(watchDir, filename);
+              fs.stat(filePath, (err, stats) => {
+                if (err) {
+                  console.error(err);
+                  return;
+                }
+                if (stats.isFile()) {
+                  const payload = {};
+                  payload[variableName] = filename;
+                  Actions.invokeEvent(event, null, payload);
+                }
+              });
+            }
+          });
+
+          fileWatcher.watchers[eventName] = watcher;
+          console.log(`[File Watcher] Event '${eventName}' has been set up for directory '${watchDir}'.`);
+        } catch (error) {
+          console.error(`Event error: ${error}`);
+        }
+      }
+    };
+
+    const { onReady } = DBM.Bot;
+    DBM.Bot.onReady = function fileWatcherOnReady(...params) {
+      fileWatcher.setupWatchers();
+      onReady.apply(this, params);
+    };
+  },
+};