Rebrand as Playpen.

dist/dev.greyson.playpen.desktop.in

@@ -0,0 +1,16 @@
+[Desktop Entry]
+Type=Application
+Name=Playpen
+GenericName=Terminal
+Comment=Terminal with vertical tabs, web panes and saved layouts
+# Substituted with an absolute path by `mise run install`, because desktop
+# launchers do not reliably have ~/.local/bin on PATH.
+Exec=@EXEC@
+Icon=dev.greyson.playpen
+Terminal=false
+Categories=System;TerminalEmulator;
+Keywords=shell;prompt;command;commandline;cmd;terminal;tabs;
+StartupNotify=true
+# Lets the compositor match the running window to this entry, which is what
+# gives the window its icon. Must equal the GApplication id.
+StartupWMClass=dev.greyson.playpen