Add user config gui.commitAuthorFormat

docs/Config.md

@@ -181,6 +181,11 @@ gui:
   # If true (default), file icons are shown in the file views. Only relevant if NerdFontsVersion is not empty.
   showFileIcons: true
 
+  # Whether to show full author names or their shortened form in the commit graph.
+  # One of 'auto' (default) | 'full' | 'short'
+  # If 'auto', initials will be shown in small windows, and full names - in larger ones.
+  commitAuthorFormat: auto
+
   # Length of commit hash in commits view. 0 shows '*' if NF icons aren't on.
   commitHashLength: 8