v1.0.0: merge select → dialog — eliminate cl-tty.select package

The select widget (filtered option list) was only used by the dialog
system. Merging removes an entire package boundary, simplifies the
dependency chain, and reduces the library from 12 packages to 11.

Changes:
- absorb select class, accessors, filter, navigation, key handling,
  rendering, fuzzy matching, and all tests into dialog.org
- update cl-tty.dialog package to use cl-tty.box (for dirty-mixin)
  and cl-tty.layout (for layout-node)
- remove select.org, select-package.lisp, select.lisp, select-tests
- update ASDF, run-all-tests.lisp, scripts to drop select references
- update integration tests to use cl-tty.dialog instead of cl-tty.select

All 13 test suites pass at 100%.

scripts/audit-compiler.lisp

@@ -37,8 +37,7 @@
           "src/components/markdown-package.lisp" "src/components/markdown.lisp"
           "src/components/mouse-package.lisp" "src/components/mouse.lisp"
           "src/components/package.lisp" "src/components/render.lisp"
-          "src/components/scrollbox.lisp" "src/components/select-package.lisp"
-          "src/components/select.lisp" "src/components/slot-package.lisp"
+          "src/components/scrollbox.lisp" "src/components/slot-package.lisp"
           "src/components/slot.lisp" "src/components/tabbar.lisp"
           "src/components/text-input.lisp" "src/components/text.lisp"
           "src/components/textarea.lisp" "src/components/theme.lisp"
@@ -50,7 +49,7 @@
           "src/components/box-tests.lisp" "src/components/dirty-tests.lisp"
           "src/components/render-tests.lisp" "src/components/theme-tests.lisp"
           "src/components/input-tests.lisp"
-          "tests/scrollbox-tabbar-tests.lisp" "tests/select-tests.lisp"
+          "tests/scrollbox-tabbar-tests.lisp" "tests/dialog-tests.lisp"
           "tests/markdown-tests.lisp" "tests/dialog-tests.lisp"
           "tests/mouse-tests.lisp" "tests/slot-tests.lisp"
           "tests/framebuffer-tests.lisp")))