Small changes for better usability

[ThePixelbrain]

I made a few changes to the page for better usability.

Here is a list of what I changed:

• Made the site fully controllable with keyboard inputs. Pressing enter will start a search, tab can be used to switch between elements and the arrow keys can be used to in- or decrease the minimum steps
• Search results will be added to the top instead of the bottom, so the users don't need to scroll each time they start a new search
• Removed legacy codebase. The main repository hasn't been active for two years, so it's unlikely this fork will ever be pulled. There is no need to keep the original code, as it's unused and only produces useless traffic
• Small refactors and typo fixes

NOTE:
I'm worried this will never get pulled, since this repository seems pretty dead. I put up a GitHub Page for my fork, which is reachable under: https://tcresearch.pixelbrain.dev/
If this gets pulled, I will remove my page, as it would be no longer needed.