feat: Adds keyboard shortcuts for conversation actions (#2672)

* feat: Adds keyboard shortcuts for conversation actions

* Minor fixes

* Minor fixes

* Minor fixes and add new shortcut

* MInor fixes

* Review fixes

* Minor fixes

* Code cleanup

* Minor fixes

* Uses Alt or Option key instead of shift-key

* Review fixes

* Review fixes

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/shared/mixins/eventListenerMixins.js

@@ -0,0 +1,8 @@
+export default {
+  mounted() {
+    document.addEventListener('keydown', this.handleKeyEvents);
+  },
+  destroyed() {
+    document.removeEventListener('keydown', this.handleKeyEvents);
+  },
+};