Enable a few more tsconfig options (#35553)

Enable a few more useful options in tsconfig. `noImplicitReturns` had
two cases which I've fixed. Also, partially sort the file.

tsconfig.json

@@ -1,7 +1,7 @@
 {
   "include": [
-    "${configDir}/.*",
     "${configDir}/*",
+    "${configDir}/.*",
     "${configDir}/tests/e2e/**/*",
     "${configDir}/tests/e2e/**/.*",
     "${configDir}/tools/**/*",
@@ -17,27 +17,31 @@
     "allowImportingTsExtensions": true,
     "allowJs": true,
     "allowSyntheticDefaultImports": true,
+    "allowUnreachableCode": false,
+    "allowUnusedLabels": false,
     "alwaysStrict": true,
     "erasableSyntaxOnly": true,
     "esModuleInterop": true,
+    "exactOptionalPropertyTypes": false,
     "isolatedModules": true,
     "libReplacement": false,
     "noEmit": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "noPropertyAccessFromIndexSignature": false,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
     "resolveJsonModule": true,
     "skipLibCheck": true,
-    "verbatimModuleSyntax": true,
-    "stripInternal": true,
+    "sourceMap": true,
     "strict": false,
     "strictBindCallApply": true,
     "strictBuiltinIteratorReturn": true,
     "strictFunctionTypes": true,
-    "noImplicitAny": true,
-    "noImplicitThis": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noPropertyAccessFromIndexSignature": false,
-    "exactOptionalPropertyTypes": false,
-    "sourceMap": true,
+    "stripInternal": true,
+    "verbatimModuleSyntax": true,
     "types": [
       "vitest/globals",
       "./web_src/js/globals.d.ts",