Move primitives and runtime out of src/common/

Relocate src/common/primitives and src/common/runtime to src/primitives
and src/runtime. Add src/tsconfig.json as the primitives+runtime solution.
Update tsconfigs, esbuild, webpack aliases, publish path, and docs.

Co-authored-by: Daniel Imms <Tyriar@users.noreply.github.com>

webpack.config.headless.js

@@ -30,7 +30,10 @@ const config = {
     modules: ['./node_modules'],
     extensions: [ '.js' ],
     alias: {
-      common: path.resolve('./out/common'),
+      common: [
+        path.resolve('./out/runtime'),
+        path.resolve('./out/primitives'),
+      ],
       headless: path.resolve('./out/target-headless'),
       vs: path.resolve('./out/vs')
     }