cl1694's World and a new tutorial idea

1) We have a new puzzle author and bug-finder-and-reporter, cl1694! They've already helped buff a post-game puzzle and opened a new world with new puzzles and buffs of other community puzzles. Check it out for a challenge! (I also got some great bug reports from Bleatnik.)

2) I'm trying yet another new idea for Chapter 0 to try to teach the concept of 'a robot going down and rewinding back up after doing something useful'. Meet Light? is out and Interference is in. It does use a one-off tile but I hope what the tile does and why I need it is self-evident enough. It'd be nice to scatter this new tile around the campaign some more but I haven't even begun to think about this yet. Anyway, let me know if this works or if it's completely off the mark, but I really want to get this game to work properly for all skill levels.

Changelogs follow:

**v19.2 (9th June 2025):**

* Chapter 0: Cut Meet Light?. Replace with Interference and its (Insight).

* Chapter D: Replace Springlock System (moved to Formless Exploration) with Kinetic Hotwire.

* Chapter -1: ||Buff Pachinko (Loop 2) [VAR1]. Add cl1694 to credits guest levels.||

* Chapter M (WIP): Move Phantom Push and [VAR1] here.

* The Cutting Room Floor: Add Lightning Round, Lightning Snake.

* Green's World: Add Stuck [VAR1], Orbital Drop [VAR3]. Buff Broken Bridge [VAR2].

* cl1694's World: Open a new chapter in Community Levels. Add Woodchunk and its (Insight), Woodchunk [VAR1], Joke Moving Service, Tile Selector [Low Power], Window of Opportunity [VAR1], Fire In The Sky [REV1] [VAR1], The Eclipse Pit [VAR1].

* Custom elements: Add No Move.

* Level editor: 'New Level' is now called 'Clear Level'.

* Add a 'Discord' button to the Intro and Outro. Fix button focus issues in the Outro.

* Replays that win by ||merging Chrono Helixes|| finally for realsies this time save properly.

* Space Program/Far Lands/Void Diver achievements now only trigger if a robot is sent in that direction.

* The menu button for Your Replay now changes to Save Replay when shift is held/Unwin when ctrl is held.

* Replay Turn- and Replay Turn+ now work even if Replay Mode is off (turning Replay Mode on first). As a side-effect, while using a controller, Previous Level and Next Level now don't work while Replay Mode is on (to allow LT/RT to act as Replay Turn- and Replay Turn+ in more circumstances).

* Bug Gallery: Improved crash handling in Negativity/Cut and Paste.

* Publish Chapter E Steam Achievements and a hint for Exception Handler Steam Achievement.

* Fix a Continuum/undo bug.

* Fix a visual bug where Cuckoo Clocks did not chime.

* Fix a visual bug when scrubbing through a Voidlike replay where Cuckoo Clocks have chimed.

* Fix a visual bug when rewinding a Voidlike replay through an actor changing Colour (or similar brittle animations).