Add '.jj' to ignore patterns in config.lua

Ignore `.jj` directories for anyone using jujutsu for version control

Author: jwkicklighter

lua/opencode/config.lua

@@ -156,6 +156,7 @@ M.defaults = {
           '^%.git/',
           '^%.svn/',
           '^%.hg/',
+          '^%.jj/',
           'node_modules/',
           '%.pyc$',
           '%.o$',