fix(util): Leverage "emojibase" library for shortcode conversions (#9785)

lib/util/emoji.spec.ts

lib/util/emoji.ts

lib/workers/pr/__snapshots__/index.spec.ts.snap

lib/workers/pr/body/__snapshots__/controls.spec.ts.snap

lib/workers/pr/body/controls.ts

lib/workers/pr/index.ts

.../onboarding/pr/__snapshots__/errors-warnings.spec.ts.snap

package.json

tools/generate-imports.mjs

yarn.lock