Add support for multi-level ordered lists

[antoinelamy]

Add support for multi-level ordered lists supporting two types of delimiters: parenthesis and periods.

It also support mix-and-matching delimiters and list styles. As an exemple, the following markdown:

1) Item 1
1) Item 2
1) Item 3
   1. Item 3a
      * Item 3a1
      * Item 3a2
   1. Item 3b
1) Item 4
1) Item 5
   1. Item 5a
   1. Item 5b

Would produce the following result with the default ParmaRenderable:

Notes

• The default bullet list style has been updated to switch between • and ◦ for better readability
  

• Fixes the additional spacing for multi-level lists when entering a deeper level
  

[antoinelamy]

Should I bump version number in the podspec?

[dasautoooo]

Hi @antoinelamy ,

Thank you so much for this PR, it is amazing!
It looks good for me, and we're definitely going to bump to 0.3.0.

The list item delegate method is changed, so the code snippet in the readme should change either.

Thanks again!

[dasautoooo]

Since the list item delegate method is changed, the embedded sample should be changed either; it's the ContentView.swift file in Sample/Shared.

[antoinelamy]

Since the list item delegate method is changed, the embedded sample should be changed either; it's the ContentView.swift file in Sample/Shared.

I updated the sample to give an exemple of a basic ParmaRenderable implementation like the other elements.

[antoinelamy]

I would be curious to know what is your setup to build this project, I had to manually delete the Down file references pointing to the build directory and add them back as a SPM dependency for the project to compile. I'm pretty sure you don't go over these steps so maybe I'm doing something wrong or maybe it could be documented in the Readme for future contributors. Anyway, great library 👌🏻.

[dasautoooo]

It's unnecessary to manually do that because a skeleton project has already added, which is the sample project, and it contains the Xcode project of Parma. Use that to build either Parma or the iOS skeleton app, make sure to run swift package generate-xcodeproj to generate the correct Parma.xcodeproj.

Thanks for your advice, and I'll add some contribution messages to the Readme.

Great work, thanks! 😊

[antoinelamy]

I think it's the swift package generate-xcodeproj that was missing for me, still not used to SPM yet. Thanks for the tip!

[dasautoooo]

🎉 Parma 0.3.0 was released! Thanks again 🙌.