feat(cli): run watch mode

[DanielHougaard]

Description 📣

This PR aims to add support for secret watching. The user will now be able to pass a --watch flag to the infisical run command. When the watch flag is passed, Infisical will automatically reload the command passed to infisical run.

New flow example

1. User runs infisical run --watch --comand="while true; do printenv; sleep 500000; done". (Both --command and -- supports the new watch flag)
   • At first this acts exactly like it always has, and prints the environment to the console and hangs until interrupted.
2. The user now changes a secret in Infisical.
3. At some point within the next 10 seconds (due to polling), the application will detect a change in the Infisical secrets, and then trigger a reload of the application.
4. The application reloads and the new secrets are loaded into the application.

This is especially useful in local development setups, where the user usually would have to manually restart the entire process for the new secrets to load in. This implementation streamlines everything and in a sense acts like Nodemon acts when detecting changes in a Node.js project.

This can also be used in production environments where you'd want to reload an application when secret changes happen in Infisical.

Type ✨

• Bug fix
• New feature
• Breaking change
• Documentation

---

• I have read the contributing guide, agreed and acknowledged the code of conduct. 📝