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%

scripts/audit-compiler.lisp

@@ -29,7 +29,6 @@
         '("src/backend/classes.lisp" "src/backend/package.lisp"
           "src/backend/detection.lisp" "src/backend/simple.lisp" "src/backend/modern.lisp"
           "src/layout/layout.lisp"
-          "src/components/container-package.lisp"
           "src/components/dialog-package.lisp" "src/components/dialog.lisp"
           "src/components/dirty.lisp"
           "src/components/input-package.lisp" "src/components/input.lisp"

scripts/code-audit.lisp

@@ -28,7 +28,6 @@
         '("src/backend/classes.lisp" "src/backend/package.lisp"
           "src/backend/detection.lisp" "src/backend/simple.lisp" "src/backend/modern.lisp"
           "src/layout/layout.lisp"
-          "src/components/container-package.lisp"
           "src/components/dialog-package.lisp" "src/components/dialog.lisp"
           "src/components/dirty.lisp"
           "src/components/input-package.lisp" "src/components/input.lisp"