rewrite module to typescript

src/variables.ts

@@ -0,0 +1,26 @@
+import { TogglTrack } from './main.js'
+
+export default function (self: TogglTrack): void {
+	self.setVariableDefinitions([
+		{
+			name: 'Workspace',
+			variableId: 'workspace',
+		},
+		{
+			name: 'Current Timer Id',
+			variableId: 'timerId',
+		},
+		{
+			name: 'Current Timer Duration',
+			variableId: 'timerDuration',
+		},
+		{
+			name: 'Last Timer Duration',
+			variableId: 'lastTimerDuration',
+		},
+		{
+			name: 'Current Timer Description',
+			variableId: 'timerDescription',
+		},
+	])
+}