docs: Add todo list

README.md

@@ -24,3 +24,12 @@ Use the extension popup to create new identities and delete old ones.
 ## Contributing
 
 Run `npm ci` to do a clean install and use the `lint` and `test` scripts to check your work.
+
+## Todo
+
+- [x] Warn when trying to delete an identity/container that has active tabs
+  - There is now a button that only deletes containers that don't have associated tabs
+- [x] Remove overflow-y-scroll
+- [x] Cycle between locations for a certain country/city
+- [ ] Warn user if current container is no longer in the list of servers (offline or removed) and therefore can't be proxied
+- [ ] Write logic so it's possible to switch the proxy of an existing container with `browser.contextualIdentities.update()`