Enable new submissions via web page form

[thewtex]

We could use Netlify CMS with GitHub integration and web3.storage API's.

New plan, greatly simplified and more capable: base on GitHub Actions, GitHub pull request forms! 🚀 ✨

Using the setup of @jcfr for the Project Week website. Refs:

• https://github.com/NA-MIC/ProjectWeek/issues/new/choose
• Project: Improve TCIA Browser extension NA-MIC/ProjectWeek#667
• https://github.com/NA-MIC/ProjectWeek/blob/master/.github/workflows/project-page-pull-request.yml
• Add project "Improve TCIA Browser extension" to "PW39_2023_Montreal" NA-MIC/ProjectWeek#668

We can likely avoid the issue creation and go forward directly with a PR from the form.

[jcfr]

Additionally, to support creating pull-request, a dedicated "GitHub App" can be created. See https://github.com/peter-evans/create-pull-request/blob/main/docs/concepts-guidelines.md#authenticating-with-github-app-generated-tokens

This allows to selectively grant authorization to repository.

For example: