v1.0.0: merge container (scrollbox + tabbar) into cl-tty.box

Eliminates the cl-tty.container package by merging scrollbox and tabbar
components directly into cl-tty.box, where the component system lives.

Changes:
- added scrollbox/tabbar exports to cl-tty.box defpackage in package.org
- changed scrollbox.org in-package from cl-tty.container to cl-tty.box
- changed tabbar.org in-package from cl-tty.container to cl-tty.box
- tabbar's key-event-key references are qualified with cl-tty.input:
  (avoids circular :use dependency with cl-tty.input which :uses cl-tty.box)
- deleted container-package.org
- updated test packages, integration tests, scripts, ASDF
- all 14 test suites pass at 100%

org/integration-tests.org

@@ -50,7 +50,7 @@ package, so the symbol must be interned and accessible.
 (defpackage :cl-tty-integration-test
   (:use :cl :fiveam
         :cl-tty.backend :cl-tty.box :cl-tty.layout
-        :cl-tty.input :cl-tty.container
+        :cl-tty.input
         :cl-tty.rendering :cl-tty.dialog))
 
 (in-package :cl-tty-integration-test)