feat(gui, tauri): Accept --testnet flag, default to mainnet (#106)

This PR tackles #92 

- Add the `tauri-plugin-cli` (only on desktop)
- Check in the frontend if the `--testnet` flag is set. If it's set we pass `testnet=true` to the `initialize_context` command on invokation
- We add the `vite-plugin-top-level-await` to allow top level await in all browsers
- Remove the `bitcoin_confirmation_target` from settings for simplicity

src-gui/src/renderer/rpc.ts

@@ -36,6 +36,7 @@ import { providerToConcatenatedMultiAddr } from "utils/multiAddrUtils";
 import { MoneroRecoveryResponse } from "models/rpcModel";
 import { ListSellersResponse } from "../models/tauriModel";
 import logger from "utils/logger";
+import { isTestnet } from "store/config";
 
 export async function initEventListeners() {
   // This operation is in-expensive
@@ -201,7 +202,10 @@ export async function listSellersAtRendezvousPoint(
 
 export async function initializeContext() {
   const settings = store.getState().settings;
+  const testnet = isTestnet();
+
   await invokeUnsafe<void>("initialize_context", {
     settings,
+    testnet,
   });
 }