Refactor tsconfigs to share compiler options

This lets each config specify *only* how it actually does a build (or
not!), while sharing the config explicitly.

tsconfig.compiler-options.json

@@ -0,0 +1,34 @@
+{
+  "compilerOptions": {
+    // Compilation Configuration
+    "target": "es2019",
+    "sourceMap": true,
+    "baseUrl": "packages",
+    "rootDir": "packages",
+
+    // Environment Configuration
+    "experimentalDecorators": true,
+    "moduleResolution": "node",
+
+    // Enhance Strictness
+    "strict": true,
+    "noImplicitReturns": true,
+    "allowUnreachableCode": false,
+    "noPropertyAccessFromIndexSignature": true,
+    "noUnusedLocals": true,
+    "noUncheckedIndexedAccess": true,
+    "noUnusedParameters": true,
+    "esModuleInterop": false,
+    "allowSyntheticDefaultImports": false,
+
+    "newLine": "LF",
+
+    "allowJs": true,
+    "checkJs": false,
+    "paths": {
+      "backburner": [
+        "../node_modules/backburner.js/dist/backburner.d.ts"
+      ]
+    }
+  }
+}

tsconfig.json

@@ -1,39 +1,8 @@
 {
+  "extends": "./tsconfig.compiler-options.json",
   "compilerOptions": {
-    // Compilation Configuration
-    "target": "es2019",
-    "sourceMap": true,
-    "outDir": "dist",
-    "baseUrl": "packages",
-    "rootDir": "packages",
-
-    // Environment Configuration
-    "experimentalDecorators": true,
-    "moduleResolution": "node",
-
-    // Enhance Strictness
-    "strict": true,
-    "noImplicitReturns": true,
-    "allowUnreachableCode": false,
-    "noPropertyAccessFromIndexSignature": true,
-    "noUnusedLocals": true,
-    "noUncheckedIndexedAccess": true,
-    "noUnusedParameters": true,
-    "esModuleInterop": false,
-    "allowSyntheticDefaultImports": false,
-
-    "newLine": "LF",
     "noEmit": true,
-
-    "allowJs": true,
-    "checkJs": false,
-
-    "paths": {
-      "backburner": ["../node_modules/backburner.js/dist/backburner.d.ts"]
-    }
   },
-
   "include": ["packages/**/*.ts"],
-
   "exclude": ["dist", "node_modules", "tmp", "types"]
 }

tsconfig.types.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://json.schemastore.org/tsconfig",
-  "extends": "./tsconfig.json",
+  "extends": "./tsconfig.compiler-options.json",
   "compilerOptions": {
     "noEmit": false,
     "declaration": true,
@@ -17,12 +17,6 @@
     "packages/@glimmer/**/*"
   ],
   "exclude": [
-    "dist",
-    "node_modules",
-    "tmp",
-    "types",
-    "packages/ember-template-compiler",
-    "packages/ember-testing",
-    "packages/internal-test-helpers"
+    "**/type-tests"
   ]
 }