feat: allow custom var name for with statement and nesting of files.

[liz3]

feat: allow custom var name for with statement and nesting of files.

What's Changed:

This refactors the logic in the compiler to allow files to have
custom variable names and also allow the nesting of multiple files
within each other. Both of which should be possible.
The latter is a bit questionable in terms of code quality but needed anyways.

Type of Change:

• Bug fix
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Housekeeping:

• Tests have been updated to reflect the changes done within this PR (if applicable).
• Documentation has been updated to reflect the changes done within this PR (if applicable).

Screenshots (If Applicable):

[liz3]

Oh btw @Jason2605 do you have a email address or something i can contact you outside of github?

[Jason2605]

Thanks for this!

Of course my friend: [email protected]