Added two keyboards

[andresteare]

Hi! I'm just a keyboard enthusiast that converted two keyboard (one with a dead MCU and a typewriter) to run with a Teensy! The keyboards are:

• Gamdias 7 colors fullsize iso keyboard
• IBM 6715 typewriter with (buckling springs!)

Note on the IBM one: both shift keys share the same circuit so, to avoid any confussion, I excluded RShift from the keymap (I put bigger warning in the README)

Both of them work flawlessly, I started the idea of supporting the community because I gave the Gamdias to a friend who doesn't even know what QMK is so having the keyboard officially supported by the online configurator would be very helpful. But then decided to pull all the keyboard, because why not help the community :)

I'm a noob when it comes to github, so I hope my request meets the expected standars :)

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• [x ] Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes. (I'm not sure what you mean by cover but I test and compile after every change I make)
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[andresteare]

So what's next? I have 2 approvals and all checks passed

[drashna]

Just for somebody to merge it. :)

[andresteare]

Just for somebody to merge it. :)

Thank you! :)