[REF-3227] implement more literal vars (#3687)

* implement more literal vars

* fix super issue

* pyright has a bug i think

* oh we changed that

* fix docs

* literalize vars recursively

* do what masen told me :D

* use dynamic keys

* forgot .create

* adjust _var_value

* dang it darglint

* add test for serializing literal vars into js exprs

* fix silly mistake

* add  handling for var and none

* use create safe

* is none bruh

* implement function vars and do various modification

* fix None issue

* clear a lot of creates that did nothing

* add tests to function vars

* added simple fix smh

* use fconcat to make an even more complicated test

reflex/experimental/vars/__init__.py

@@ -3,10 +3,16 @@
 from .base import ArrayVar as ArrayVar
 from .base import BooleanVar as BooleanVar
 from .base import ConcatVarOperation as ConcatVarOperation
+from .base import FunctionStringVar as FunctionStringVar
 from .base import FunctionVar as FunctionVar
 from .base import ImmutableVar as ImmutableVar
+from .base import LiteralArrayVar as LiteralArrayVar
+from .base import LiteralBooleanVar as LiteralBooleanVar
+from .base import LiteralNumberVar as LiteralNumberVar
+from .base import LiteralObjectVar as LiteralObjectVar
 from .base import LiteralStringVar as LiteralStringVar
 from .base import LiteralVar as LiteralVar
 from .base import NumberVar as NumberVar
 from .base import ObjectVar as ObjectVar
 from .base import StringVar as StringVar
+from .base import VarOperationCall as VarOperationCall