build(types): ENG-04 add strict projects and legacy compiler checks

test/types/browser.ts

@@ -0,0 +1,9 @@
+const element: HTMLDivElement = document.createElement('div')
+const value: string | undefined = ['first'][1]
+void [element, value]
+
+// @ts-expect-error Node globals must not leak into browser packages.
+globalThis.process.cwd() // eslint-disable-line node/prefer-global/process -- Check that browser projects cannot see ambient Node globals.
+// @ts-expect-error Array indexing may return undefined in implementation checks.
+const unchecked: string = ['first'][1]
+void unchecked