Migrate app to TypeScript (#1637)

* Initial setup and migrated src/common

* WIP

* WIP

* WIP

* Main module basically finished

* Renderer process migrated

* Added CI step and some fixes

* Fixed remainder of issues and added proper ESLint config

* Fixed a couple issues

* Progress!

* Some more fixes

* Fixed a test

* Fix build step

* PR feedback

tsconfig.json

@@ -0,0 +1,35 @@
+{
+    "compilerOptions": {
+      "target": "esnext",
+      "lib": [
+        "dom",
+        "dom.iterable",
+        "esnext"
+      ],
+      "allowJs": true,
+      "skipLibCheck": true,
+      "esModuleInterop": true,
+      "allowSyntheticDefaultImports": true,
+      "strict": true,
+      "strictNullChecks": true,
+      "forceConsistentCasingInFileNames": true,
+      "module": "commonjs",
+      "moduleResolution": "node",
+      "resolveJsonModule": true,
+      "noEmit": true,
+      "experimentalDecorators": true,
+      "jsx": "react",
+      "baseUrl": "./src",
+    },
+    "include": [
+      "./src/**/*"
+    ],
+    "exclude": [
+      "dist",
+      "e2e",
+      "!node_modules/@types",
+      "storybook-static",
+      "coverage"
+    ]
+  }
+