[TRI-1400] Create a Gadget adapter

[ericallam]

@edlaver has written up a detailed guide on how to use Trigger.dev with Gadget.dev that we should use to create an official adapter package at @trigger.dev/gadget.

https://gist.github.com/edlaver/e9e0f9bf48e2b5674659c2eb091b6f7b

Please make sure to use Typescript for all code

Task 1 - Gadget.dev Adaptor

• [ ] Create a new folder in packages called gadget
• [ ] Create the adaptor for Gadget following the gist above
• [ ] Create a basic Gadget.dev project that uses the adaptor in references/gadget folder. Include a basic Job in Trigger.dev, e.g. a simple Job that just does a delay inside it. Screen grab the full Run dashboard page showing it successfully worked. Here are examples of how to do cross-project references in package.json and tsconfig.json.
• [ ] Provide a screen grab of your terminal showing the Adaptor is working

Task 2 – Add a README.md file

• [ ] Create a new README.md file inside the packages/gadget folder and copy in the contents from packages/nextjs/README.md. Adjust the wording to reference gadget.dev where needed, including updating the the URLs.

Task 3 – Write the documentation

• [ ] Create the manual-setup-gadget.mdx file in /docs/_snippets/. Use this file to write your documentation. Follow the structure of this Next.js example for reference when writing yours.
• [ ] Update the table at the bottom of the client-adaptors.mdx page with the framework you’ve worked on.

_TRI-1400