v1.0.0: extract theme from cl-tty.box to own cl-tty.theme package

The theme system (theme class, define-preset, load-preset, theme-color)
was part of the bloated cl-tty.box package even though it had nothing
to do with boxes, spans, or component rendering. It only used cl-tty.backend
for the *theme-colors* hash table.

Changes:
- added defpackage :cl-tty.theme as the first block in theme.lisp
  (inline defpackage avoids ASDF dependency ordering issues with
   separate package files)
- removed theme exports from cl-tty.box defpackage
- theme tests now run in their own THEME-SUITE (16 tests) instead of
  part of BOX-SUITE
- box suite drops from 64 to 48 tests (16 moved to theme suite)
- updated ASDF, run-all-tests.lisp

All 15 test suites pass at 100%.

cl-tty.asd

@@ -16,18 +16,18 @@
    (:module "src/layout"
     :components
     ((:file "layout")))
-   (:module "src/rendering"
-    :components
-    ((:file "framebuffer")))
-   (:module "src/components"
+    (:module "src/rendering"
+     :components
+     ((:file "framebuffer")))
+    (:module "src/components"
     :components
     ((:file "package")
      (:file "dirty")
      (:file "box" :depends-on ("package"))
-     (:file "text" :depends-on ("package" "box"))
-     (:file "render" :depends-on ("package" "box" "text"))
-     (:file "theme" :depends-on ("package"))
-     ;; Input system (v0.5.0)
+      (:file "text" :depends-on ("package" "box"))
+      (:file "render" :depends-on ("package" "box" "text"))
+      (:file "theme" :depends-on ("package"))
+      ;; Input system (v0.5.0)
      (:file "input-package" :depends-on ("package"))
      (:file "input" :depends-on ("input-package" "dirty" "box"))
      (:file "text-input" :depends-on ("input-package" "input" "box"))
@@ -82,8 +82,9 @@
                                  (:cl-tty-input-test "INPUT-SUITE")
                                  (:cl-tty-scrollbox-test "SCROLLBOX-SUITE")
                                  (:cl-tty-markdown-test)
-                                 (:cl-tty-dialog-test "DIALOG-SUITE")
-                                 (:cl-tty-slot-test "SLOT-SUITE")
+                                  (:cl-tty-dialog-test "DIALOG-SUITE")
+                                  (:cl-tty-theme-test "THEME-SUITE")
+                                  (:cl-tty-slot-test "SLOT-SUITE")
                                 (:cl-tty-layout-test "LAYOUT-SUITE")
                                 (:cl-tty-modern-backend-test "MODERN-BACKEND-SUITE")
                                 (:cl-tty-framebuffer-test "FRAMEBUFFER-SUITE")))