pixelscript 0.5.1

Multi language scripting runtime
Documentation 
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# TODO


- Make better use of anyhow
- Make better use of '?'
- C tests
    - Lua
    - Python
    - JS
    - Easyjs

- Add a LSP
- Fix warnings (remove or ignore)

## v0.5

- Lazy Init
- Reference counting for PixelScript object
- pxs_Error (returned when there is a error in pixelscript not necessarily a error in a backend)

## v0.6

- pxs DSL

## LSP

- Remove ModuleCallbacks just use Function
- Remove ModuleVariables just use PixelVariable {name, var}

## Functions

- Use VarList instead of argc and argv?

## Modules


## Objects

- Drop pxs_Object created from factory when it's no longer needed.

## Vars

- Add Map
- Copy might need to be a little smarter because right now if you copy a object and pass it into a function that takes ownership or the 
    arg it will drop it. So either we allow a copy without deleter function. Or we internally recreate a new reference,
    I think pxs_copy_nodelete() is a good idea. But I would rather not add a new lib function. Rather if something could be done internally that is 
    not too complex like `PythonPointer`. That would be better. (Copy is fine | if you need to use a variable multiple times without it being dropped,
    copy it first and then pass in to any function the original value because this has no deleter | When done with the value, you will have to call `pxs_freevar` on 
    the copied value.)

## STD

- Add std library via pixelscript runtime. These are optional and handled via features
    - io (reading/writing files/directories)
    - os (some OS level stuff (delete, move, idk))

## Lua

- Remove io, os, and hackable modules.
- add STD json module.
- Potentially drop down to raw C lua files?

## Python (rustpython)

- Eventually look back at this

## Python (PocketPy)

- Make callback global. i.e. one per thread
- Make object callbacks global. i.e. one per object
- When dirreader, filereader, filewriter are set, allow with open().
- Add a test for HostObject that holds another HostObject as reference. (FastTerrain)

## JS

- add_variable
- add_callback
- add_module
- execute_javascript
- module_add_variable
- module_add_callback
- module_add_module

## Maybes

- Enums?
- Removing Strings for internal use. I.e. object ids in Python. Try using i32 instead.
- Never return a null pointer? Only use pxs_Var(null)