Minigrid: Submit ViewSizeWrapper and RenderResizeWrapper PRs to Minigrid

[jbloomAus]

I wrote a few wrappers for minigrid environments. which should probably live in the Minigrid github repo.

If someone has the time to submit that as a PR and write whatever tests their maintainers require (probably not a huge amount, then this would be greatly appreciated.

Checklist: [ ] make a PR to Minigrid with the wrappers (double check the view size wrapper doesn't exist, it could be that it just had a bug that I didn't want to wait for them to fix) [ ] add tests to the PR [ ] have the PR accepted [ ] when the PR is accepted, update this repo to use the new minigrid version and remove the wrapper code from this repo.