pinwheel: Match tig colors to theme and show added lines in green

hosts/pinwheel/modules/colors/default.nix

@@ -21,7 +21,7 @@ in
         regular = [
           "181818" # black
           "e0473c" # red
-          "8fa876" # green
+          "7fb35a" # green
           "b8904a" # yellow
           "8a8a8a" # blue
           "a05048" # magenta
@@ -32,7 +32,7 @@ in
         bright = [
           "5a5a5a" # black
           "ff5f52" # red
-          "a8c08a" # green
+          "9fd078" # green
           "d8b070" # yellow
           "aaaaaa" # blue
           "c06058" # magenta