Add a link to the Pokémon Workshop Discord

[AerunDev]

User Story

As a Pokémon Studio user
I want the website to expose a link to the Pokémon Workshop Discord
So that I can access the Discord server right from the website

Issue description

docs.pokemonworkshop.com currently has no visible link to the Discord server. Adding one makes the community immediately accessible to users discovering the project through the documentation.

Tasks

• Add the Discord link in a discoverable location on the docs site (footer, navbar, or contact page — to be decided)

Notes

Link to the PW Discord