Improve ExprElement

[UnderscoreTud]

Description

This PR improves the ExprElement class and adds 2 new patterns to it:
The first pattern is [the] (first|:last) %number% elements [out] of %objects% which allows you to get the first or last x elements of a list.
Example:

set {_list::*} to "foo", "bar" and "foobar"
broadcast the first 2 elements of {_list::*} # "foo", "bar"

The second pattern is [the] elements (from|between) %number% (to|and) %number% [out] of %objects% which allows you to get elements between to different indices.
Example:

set {_list::*} to 10, 20, 50, 100
broadcast the elements from 2 to 4 of {_list::*} # 20, 50, 100

---

Target Minecraft Versions: any
Requirements: none
Related Issues: #5208

[Fusezion]

Everything looks nice to me might be a good to add a few extra examples to it for the most part it's common but stuff like elements from 10 to 20 of {_list::*} aren't something some people will understand when they first interact with it

[Pikachu920]

Could we please add ElementTypes specific to these new patterns instead of merging them together? When I added ElementType, the idea was that it would explain which element is being requested. For example, ElementType.MULTIPLE doesn't really explain what elements it corresponds to. It could be named ElementType.LAST_X_ELEMENTS or something, which is much more self explanatory.

[UnderscoreTud]

I merged them because I feel like instead of having an enum for each mode + last variant, I just made it so the way we do "last" is with a boolean variable

It could be named ElementType.LAST_X_ELEMENTS or something

The ElementType.MULTIPLE could be from the first element or the last element depending on the last boolean.

Do you think I should just scrap the last boolean and instead add an enum for each type?

[Pikachu920]

Do you think I should just scrap the last boolean and instead add an enum for each type?

That's what I would prefer personally!

[Moderocky]

Looks nice.

[TheLimeGlass]

Adding bug tag as you currently CANNOT run debug mode with this class prior to this pull request.

[TheLimeGlass]

We need this pull request as it fixes this error. I keep coming back to this pull as it needs to be addressed, literally cannot run debug right now.

[02:43:38 ERROR]: #!#! Stack trace:
[02:43:38 ERROR]: #!#! java.lang.IllegalStateException
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.expressions.ExprElement.toString(ExprElement.java:172)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.conditions.CondCompare.toString(CondCompare.java:336)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.test.runner.EffAssert.toString(EffAssert.java:105)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.ScriptLoader.loadItems(ScriptLoader.java:939)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.lang.SkriptEvent.load(SkriptEvent.java:133)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.ScriptLoader.lambda$loadScripts$8(ScriptLoader.java:557)
[02:43:38 ERROR]: #!#!     at java.base/java.util.ArrayList.removeIf(ArrayList.java:1672)
[02:43:38 ERROR]: #!#!     at java.base/java.util.ArrayList.removeIf(ArrayList.java:1660)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.ScriptLoader.lambda$loadScripts$10(ScriptLoader.java:553)
[02:43:38 ERROR]: #!#!     at java.base/java.util.concurrent.CompletableFuture.uniApplyNow(CompletableFuture.java:684)
[02:43:38 ERROR]: #!#!     at java.base/java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:662)
[02:43:38 ERROR]: #!#!     at java.base/java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:2168)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:513)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:459)
[02:43:38 ERROR]: #!#!     at Skript.jar//ch.njol.skript.Skript$1.lambda$run$3(Skript.java:666)
[02:43:38 ERROR]: #!#!     at org.bukkit.craftbukkit.v1_19_R2.scheduler.CraftTask.run(CraftTask.java:101)
[02:43:38 ERROR]: #!#!     at org.bukkit.craftbukkit.v1_19_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:483)
[02:43:38 ERROR]: #!#!     at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1473)
[02:43:38 ERROR]: #!#!     at net.minecraft.server.dedicated.DedicatedServer.b(DedicatedServer.java:447)
[02:43:38 ERROR]: #!#!     at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1397)
[02:43:38 ERROR]: #!#!     at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1173)
[02:43:38 ERROR]: #!#!     at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:316)
[02:43:38 ERROR]: #!#!     at java.base/java.lang.Thread.run(Thread.java:833)

addressed

[sovdeeth]

Everything else seems great!