Is your feature request related to a problem? Please describe.
I've been struggling for days to set up a plugin that implements several blocks. I've looked at examples at github and around the net but most are outdated compared to newer block standards. I admit that my skills in using javascript/webpack/npm are fairly low.

Using the @wordpress/create-block script I quickly get a plugin with a single block up and running - but it's not easily extendable to several blocks. The php side of block init+setup is in the common "plugin.php" file. And when trying move stuff that is common to a block and place that in a subfolder to the src-folder I realize that the build/webpack scripts are not really supporting that.

What solution would you like
I would like the create-block script to generate a structure that is more modular and easier to extend to implementing more than a single block. Something like this:

plugin-folder
/build
/src
--/block1
----<all js, php, css-files that are unique to block1>
--/block2
----<all js, php, css-files that are unique to block2>
--/common-assets
----<files that are common between blocks - included js libraries, common styling etc>
plugin.php
package.json
..

Alternative solutions
The alternative would be to create as many plugins as you want blocks but this seems a bit unnecessary if creating several blocks.