Movement bug fixes and fire visuals update

I finally managed get some work done on this project again. I quashed all the long standing movement bugs I had previously been unable to fix! 

Fixed movement bugs:

• getting stuck while moving from flat terrain to a steep slope
• dash-jumping up slopes sometimes resulting in a low jump
• falling for 1 frame briefly when moving from a slope up to flat terrain
• falling for 1 frame following some attack animations
• inconsistent fall-through platform detection
• cancelled attacks/unhandled movement when using certain attacks to move off of a ledge

I've also updated all the enemies fire attacks to use the same fire particle system as the campfires and player spells.

fixed a softlock that could occur at the title screen, and fixed some attacks causing odd behavior when moving off a ledge with them

I apologize about updates on project kobolds tale being so slow, I've been focusing on trying to make a living doing VRchat and other freelance 3D / Unity work. If you'd like to support my game development, please follow the links on PKT's page to donate! Every bit helps~