Update tcsh a bit

dot_config/tcsh/dot_tcshrc

@@ -1,5 +1,9 @@
-# If running interactively, then:
+# If not running interactively, don't do anything
-if ($?prompt) then
+if (! $?prompt) return
-    set SHELL = "/usr/bin/bash"
+
-	exec $SHELL
+# Set starship if it's installed
-endif
+if (! `which starship >& /dev/null`) eval `starship init tcsh`
+
+# Just use bash
+set SHELL = "/bin/bash"
+exec $SHELL