[FEAT]: Contribute Support Page

[joyalgeorgekj]

For making the store data structured and easy to contribute we need a page in engine where contributors can create the markdown file without messing up linking with ingredients and other metadatas.

This is the workflow:

1. User navigate to the page.
2. User select an action (update/create markdown) for engine or other contributions they can choose others and navigate to github org repo of the project (@senku-io)
3. According to action they get a form with preview of markdown they can update already present ones or create new markdown for this project.
4. The form will have all options for the store markdown type.
5. There will be ingriedient search options and all input for metadata with markdown as the textarea input which will exclude ingredients, hazard level, etc which we already gathered via metadata input.
6. After everything they can download the file or copy the full markdown and they can do a PR to update the store repo in senku-io org.

We don't have to follow the exact workflow but the use for this is to not corrupt the store with broken links and metadata while following markdown rules for the store.

[joyalgeorgekj]

If anyone planning to work on this make changes and add feature in app/writer/page.tsx. Make sure you comment on the issue for assigning before start working on this.