Patterns as a website

[dpshelio]

This includes a set of changes to allow the patterns to have a website and be searchable.
This can be already be seen on the deployment in my fork.

Changes included here:

• The template and all the patterns have been modified to only have one level-one heading (<h1>) and the rest as subheadings
• All internal links have been replaced to relative ones, i.e., when pointing a page that's in this repository we only need to add the filename, e.g., [enabling students to help](./enabling-students-to-help.md).
• This change required that some files needed to be renamed to work as relative links. Only two.
• The README.md now doesn't need to contain an index. That may have the inconvenience for people that's used to navigate this on github. However, I'd expect they enjoy the experience more on the website this will produce.
• Includes the GH Actions machinery to build and deploy the website automatically when merged with main.

To enable gh pages, some of the admins need to go to settings/pages and select source: Github Actions, under the "Build and deployment" section. It would be good too to check enforce HTTPS a bit down.

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It's also a good idea, once this is done, to set on the main page of the repository to show the website. Clicking on the settings wheel on the top right corner, like shown in this image below,

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and then clicking "Use your github pages website"

[RichardLitt]

I am pretty sure I managed to do this. Check out https://curioss.org/patterns/. What do you think, @dpshelio?