examples: add favicon.ico for to avoid browser requests

[dongwonnn]

What?

To avoid the default favicon.ico request by the browser, we are adding a vercel favicon.ico to the project.
Currently, we handle exceptions for favicon.ico entering the Dynamic Route [lang] in the following manner, but in this case, favicon.ico renders the entire page.

example:app-dir-i18n-routing

export const getDictionary = async (locale: Locale) =>
  dictionaries[locale]?.() ?? dictionaries.en();

Instead of favicon.ico, the full HTML of the default language 'en' is rendered.

In the correct case

Fixes #46918

[samcx]

Thank you for submitting a !

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 6eebf73

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 6eebf73

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer