X-Endstop Support - Gantry Development

Earlier today, I pushed the X-endstop and the already shared tensioner wire delete update to GitHub.

The X-endstop is also gantry-mounted, so it's crucial to force the Y homing first. I want to keep this a single-piece design, similar to the Y-endstop, but I'm not sure if this adjustment range will be sufficient for all toolheads.

As promised, more small tweaks are coming for the gantry.

Any feedback on this is appreciated!