fix: Add generator to export image assets with their original names

[raphash]

I added a snippet of generating code to export the image assets with their original names and extensions, I cleaned up the part that says you don't need to understand how to change the names automatically generated by webpack. At the end, it includes a webpack article explaining the generator code snippet.

Because

I think the changes in this commit make it easier for students to understand, it's a small and significant change.

Changes

• Added generator to export assets with their original names.
• Cleanup the part that says "you don't need to understand how to change the names automatically generated by webpack"
• Added a webpack guide explaining the generator, and how u can use custom filenames when bundle.