v1.0.0: TUI support — resize events, with-terminal macro

- read-event now checks *terminal-resized-p* and returns :resize on SIGWINCH
- Added with-terminal convenience macro (detect → init → body → shutdown)
- Exported *terminal-resized-p* from cl-tty.input package
- Exported with-terminal from cl-tty.backend package
- Updated text-input.org with resize event integration and refactored tests
- Tests: 461 checks, 100% pass (93 input suite, +2 new test cases)

tests/input-tests.lisp

@@ -389,3 +389,21 @@
   (remhash :local *keymaps*)
   (is-false (gethash :global *keymaps*))
   (is-false (gethash :local *keymaps*)))
+
+(test resize-event-check
+  "read-event returns :resize when *terminal-resized-p* is set"
+  (let ((b (make-instance 'cl-tty.backend:backend)))
+    (setf cl-tty.input:*terminal-resized-p* t)
+    (multiple-value-bind (type data) (cl-tty.input:read-event b :timeout 0)
+      (is (eq :resize type))
+      (is (consp data))
+      (is (integerp (car data)))
+      (is (integerp (cdr data))))
+    (is-false cl-tty.input:*terminal-resized-p*)))
+
+(test with-terminal-macro-expands
+  "with-terminal macro expands and compiles"
+  (is (macro-function 'cl-tty.backend:with-terminal))
+  (let ((expanded (macroexpand-1 '(cl-tty.backend:with-terminal (be)
+                                    (print be)))))
+    (is (listp expanded))))