[IMPROVEMENT] Support Markdown parsing & display throughout

### Please confirm these before moving forward.

- [x] I have searched for my feature proposal and have not found a work-in-progress/duplicate/resolved/discarded issue.
- [x] This improvement refers to an existing feature. If you want to suggest a new feature, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=new-feature&projects=&template=feature-request.yml&title=%5BFEATURE+REQUEST%5D+%28Enter+your+description+here%29).
- [x] This improvement is not a bug. If you want to report a bug, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=bug&projects=&template=bug-issue.yml&title=%5BBUG%5D+%28Enter+your+description+here%29).

### Describe the improvement

Currently, it appears that UniGetUI does not support parsing or displaying Markdown in descriptions or release notes. It looks like there was [an issue](https://github.com/marticliment/UniGetUI/issues/1159) awhile back that tangentially requested this feature, and was then [implemented specifically for scoop](https://github.com/marticliment/UniGetUI/pull/1317) but doesn't appear to be working throughout UniGetUI. It would be nice to have broader support for parsing Markdown.

### Describe how this improvement could help users

Descriptions and release notes would be more readable and interactive for users.