More tool icons! (#3474)

* Add more icons

* Entity Markers icons

Dont store functiondata permanently (#3472)

Add range arg so duplicator factory functions works (#3470)

Fix possible error (#3469)

Someone on the GMOD Discord reported this issue. Apparently, it happens when some addon is leaking csents

https://discord.com/channels/565105920414318602/567617926991970306/1444609980736081920

Add buoyancy controller (#3456)

* Add buoyancy controller

* Critical fixes

* Small cleanups

* Make sure that self.Marks always contains only valid entities

* Add to sents_registry

* Less code duplication

* Fix typo

* Small cleanups

* Small cleanups

Fix error materials in tool hud (#3467)

Remove all instances of E2 entity functions returning nil (#3461)

* First entities NULL fixes (stopped at HoloEntity)

* Don't set entity default as nil (fixes gtable and array getters)

* Fix ioInputEntity return

* It looks like it was never supposed to return any entity

* Fix a bunch of functions
isConstrainedTo(e:)
isConstrainedTo(e:n)
isConstrainedTo(e:s)
isConstrainedTo(e:sn)
isWeldedTo(e:)
isWeldedTo(e:n)

* More saveguard

* Fix keyClk

* Fix/optimize lastSpoke

* Fix npcGetTarget

* More fixes

* Fix signalSender

* Simplify

Co-authored-by: Denneisk <20892685+Denneisk@users.noreply.github.com>

* Simplify more

---------

Co-authored-by: Denneisk <20892685+Denneisk@users.noreply.github.com>

Entity Markers refactor (#3459)

* Entity Marker cleanups

* Cleanup advanced entity marker too

* Don't need to check at this point (self.Marks now guaranteed to contain only valid entities)

* Fix dupes + lint pass

* This looks more clear for me

* It's too simple to use PrepareOverlayData

* Cleanup freezer too

* Missing label

* Missing space

* Make it single

* Use ipairs

* Fix typo

* Final cleanups

Add '@trigger none' by default (#3452)