Feat: Add script to replace keyword placeholders with user input

[KIKOmanasijev]

This PR adds a PHP script that automates the process of replacing the dummy Class Names, Namespaces, File names and etc, with real user entered data.

[Log1x]

I'd like to get rid of all the curl/endpoint stuff as well as any over the top "automation" where possible.

The Filament team's take in their plugin skeleton might be a good place to draw some inspiration on simplifying things: https://github.com/filamentphp/plugin-skeleton/blob/main/configure.php

[KIKOmanasijev]

Thanks for the comments @Log1x 🙇‍♂️.

The code styling in composer.json is corrected, and I've simplified the configure.php. Let me know what you think now.

[jasperf]

Was playing with a script setup for replacing base example package details , but it seems this Laravel / Filament kind of way is much better. Hope we get this merged soon. Did a test running php ./configure.php using the code at imagewize/sage-native-block#2 and again.. seems to run well. But some parts good be improved. README.md showed

composer require vendor-name/sage-native-block-package

so vendor-name not replaced for some reason. And title in README

# Acorn SageNativeBlock Package

would be better when it would have been three words.

Furthermore I had to make some tweaks:

• resources/views/example.blade.php did not get renamed View Renaming imagewize/sage-native-block#3
• Namespace mismatch so adjusted composer.json Namespace Mismatch imagewize/sage-native-block#4
• Console file needed renaming Console File Renaming imagewize/sage-native-block#5

But beyond that I do not see issues yet. But will have to test some more.

Here the script for reference: https://gist.github.com/jasperf/7fb70fd696d39666475581f62cf7cc43