migrate to Fire from argparse, set up entrypoints

[vit1-irk]

This commit has the following changes:

1. Remove unused dependencies
2. Add Fire dependency to handle command line arguments with less boilerplate code (it uses docstrings and function parameters for that). Breaking change notice: coordinates and box dimensions should be specified without spaces, as (x,y,z)
3. Add package entrypoints, so user does not have to type python /path/to/script every time. After fresh pip install you just type pyampp or gxbox_factory and the app works. Try this! It makes things much easier.

@sageyu123 also, try to run gxbox_factory without any arguments from terminal and see what it outputs

[sageyu123]

Looks great! @vit1-irk
I especially love the addition of entry points — running pyampp and gxbox_factory directly is super convenient.

That said, I was looking for more detailed help messages, which Fire doesn’t support well. This PR inspired me to explore alternatives, and I found Typer to be a better fit for this use case:

Benefits of using Typer over Fire and argparse:

• Cleaner, more readable code
• Built-in help, type validation, and argument parsing
• Easier to extend and maintain

I've submitted a follow-up PR that replaces argparse with Typer, while preserving backward compatibility:
PR 22

Thanks again for the inspiration! Let me know if you are happy with PR 22. If so, I will go ahead and close this PR.