New example for Crafting Blacklist's "Input_Items"

[MoltonMontro]

While reading a player's forum post, I realized our example could be clearer. It reiterates some info from Asset Definitions or Asset Pointers, but should be helpful irregardless. Although we could instead have an example with only a single (preferred) syntax, like inline.

• Placeholder text has been replaced.
• Relevant lines are highlighted.
• Although .asset files are not .cpp files, I believe including syntax highlighting when possible (& not misleading) would be helpful for readability. Maybe you have some thoughts here – or know a language that would be more "accurate" while still providing highlighting?

• Current https://docs.smartlydressedgames.com/en/stable/assets/crafting-blacklist-asset.html
• Revised https://unturned--309.org.readthedocs.build/en/309/assets/crafting-blacklist-asset.html

[SDGNelson]

Looks good, thanks!

Unfortunately, a good match for syntax highlighting doesn't come to mind. Maybe we could try a .asset file sample that includes every feature and repeat it with each supported syntax/language to see how they look?