Purpose

There's a file for a project description, which is so far only properly implemented by gitweb, even tho GitHub Repositories feature a name and short description.
https://github.com/git/git/blob/04eaff62f286226f501dd21f069e0e257aee11a6/gitweb/gitweb.perl#L2951-L2954
More information/usages:
https://git-scm.com/book/en/v2/Git-Internals-Plumbing-and-Porcelain
https://stackoverflow.com/questions/6866838/what-should-be-in-the-git-description-file
https://github.com/stephenh/git-central/blob/080aad76176bda0daef478cc1b6cd8fcbfc08112/server/post-receive-email#L453

https://lists.gnu.org/archive/html/savannah-hackers/2009-03/msg00051.html

Tasks

• ProjectDescription struct and related helpers
• Git template retrieval
• Project description retrieval, treating project description equal to template as empty
• Port constraints from GitHub repositories (such as description length)
• Read default values from description in repo create
• Write values to description wherever appropriate
• Tests