[error-utils] Create @vercel/error-utils package (#8828)

While working on #8742 i found some useful error checking code buried in
the CLI. This PR adds a new private package `@vercel/errors` that moves
those helpful utilities into its own package so it can be used
throughout the monorepo.

packages/error-utils/jest.config.js

@@ -0,0 +1,13 @@
+/** @type {import('@ts-jest/dist/types').InitialOptionsTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  coverageThreshold: {
+    global: {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100,
+    },
+  },
+};