Add :tools lsp checks for +lsp flag

Also:
- Reorganizes some :lang modules' packages.el file.
- Adds setuptools check in lang/python
- Adds javac check in lang/java
- Removes the depends-on! macro

modules/lang/ruby/doctor.el

@@ -1,5 +1,9 @@
 ;;; lang/ruby/doctor.el -*- lexical-binding: t; -*-
 
+(assert! (or (not (featurep! +lsp))
+             (featurep! :tools lsp))
+         "This module requires (:tools lsp)")
+
 (unless (executable-find "ruby")
   (warn! "Ruby isn't installed."))