Support react-refresh and shared client/server types (#98)

- Adds support for react-refresh through `@pmmwh/react-refresh-webpack-plugin`. Updated webpack config to support this. Means entire app is no longer refreshed on changes, only individual components, and state is maintained.
- React refresh removes need for `google-apps-script-webpack-dev-server` package
- In client code, support for server function autocomplete through use of gas-client 1.0.0. Requires certain files to be typescript .ts files
- Remove need for "global" exports in main server file through updated gas-webpack-plugin

test/local-development.test.js

@@ -18,7 +18,7 @@ const toMatchImageSnapshot = configureToMatchImageSnapshot({
   allowSizeMismatch: true,
 });
 expect.extend({ toMatchImageSnapshot });
-jest.setTimeout(120000);
+jest.setTimeout(180000);
 
 const srcTestFile = path.join(
   __dirname,
@@ -48,10 +48,11 @@ describe(`Local setup ${isExtended ? '*extended*' : ''}`, () => {
       deviceScaleFactor: 1,
     });
 
+    await webpackDevServerReady(process);
+
     if (isExtended) {
       await openAddon(page);
     } else {
-      await webpackDevServerReady(process);
       await page.goto('https://localhost:3000/dialog-demo-bootstrap.html');
       await page.waitForTimeout(3000);
     }