Added 'i' option to "gh" function for opening GitHub project issues.
Added 'w' option to "gh" function for opening GitHub project wiki.
Added 's' option to "gh" function for opening GitHub project settings.
Added 'g' option to "gh" function for opening GitHub project graphs.
Removed the 'p' option for "gh" function (replaced with 'r' instead).
Added 'p' option to "gh" function for opening GitHub project pulse.