Add Readme

References: https://todo.sr.ht/~u9000/objective-shell/6

Add Enum

Add static class/obj support

Closes: https://todo.sr.ht/~u9000/objective-shell/3

Namespace everything

Add Array class

References: https://todo.sr.ht/~u9000/objective-shell/11
References: https://todo.sr.ht/~u9000/objective-shell/7
References: https://todo.sr.ht/~u9000/objective-shell/8

Fix interpreter bugs found in testing

Add class support to standard library

Implements: https://todo.sr.ht/~u9000/objective-shell/2

Clean up function declaration style

Fix shift bug in main

Add escape function

Implements: https://todo.sr.ht/~u9000/objective-shell/10

Add method chaining via `xobj`

Implements: https://todo.sr.ht/~u9000/objective-shell/9

Replace `rmobj` with `unset -o`

Fixes: https://todo.sr.ht/~u9000/objective-shell/4

Add `persistent` variable modifier

Implements: https://todo.sr.ht/~u9000/objective-shell/1

Add interpreter skeleton