acrostiche:0.3.0

[Grisely]

I am submitting

• a new package
• an update for a package

I have read and followed the submission guidelines and, in particular, I

• selected a name in conformance with the guidelines
• added a typst.toml file with all required keys
• added a README.md with documentation for my package
• have chosen a license and added a LICENSE file or linked one in my README.md
• ensured that my submission does not infringe upon the rights of a third party
• tested my package locally on my system and it worked
• named this PR as name:version of the submitted package
• agree that my package will not be removed without good reason

Update: Introduce a new parameter for the index listing to customize the style of the list. Default to the previous value for backward compatibility. Add a quick start section in the readme and explain the new parameter.