v2 initial commit

src/background.ts

@@ -0,0 +1,10 @@
+export {}
+
+chrome.runtime.onMessage.addListener(async (message) => {
+  chrome.tabs.query({ active: true, currentWindow: true }, async (tabs) => {
+    const tab = tabs[0]
+    await chrome.sidePanel.open({
+      windowId: tab.windowId
+    })
+  })
+})