feat: add fzf-based file/plugin/port selection and update build system

tests/test_tui_stub.c

@@ -0,0 +1,32 @@
+/* Stub for tui functions used by script.c in test builds */
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include "tui.h"
+
+char *tui_fzf_select(const char *const items[], size_t count, const char *prompt) {
+    (void)items;
+    (void)count;
+    (void)prompt;
+    return NULL;
+}
+
+void tui_cleanup(void) {
+    /* no operation */
+}
+/* Stub for tui functions used by script.c in test builds */
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include "tui.h"
+
+char *tui_fzf_select(const char *const items[], size_t count, const char *prompt) {
+    (void)items;
+    (void)count;
+    (void)prompt;
+    return NULL;
+}
+
+void tui_cleanup(void) {
+    /* no operation */
+}