add sgr-full PoC

src/poc/sgr-full.c

@@ -0,0 +1,34 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <notcurses/notcurses.h>
+
+int main(void){
+  struct notcurses* nc = notcurses_init(NULL, NULL);
+  if(nc == NULL){
+    return EXIT_FAILURE;
+  }
+  int dimy, dimx;
+  struct ncplane* n = notcurses_stddim_yx(nc, &dimy, &dimx);
+  ncplane_set_attr(n, NCSTYLE_NONE);
+  ncplane_putstr_yx(n, 0, 0, "a ═");
+  ncplane_set_attr(n, NCSTYLE_ITALIC);
+  ncplane_putstr_yx(n, 1, 0, "a ═");
+  ncplane_set_attr(n, NCSTYLE_BOLD);
+  ncplane_putstr_yx(n, 2, 0, "a ═");
+  ncplane_set_attr(n, NCSTYLE_REVERSE);
+  ncplane_putstr_yx(n, 3, 0, "a ═");
+  ncplane_set_attr(n, NCSTYLE_UNDERLINE);
+  ncplane_putstr_yx(n, 4, 0, "a ═");
+  if(notcurses_render(nc)){
+    goto err;
+  }
+  sleep(5);
+  if(notcurses_stop(nc)){
+    return EXIT_FAILURE;
+  }
+  return EXIT_SUCCESS;
+
+err:
+  notcurses_stop(nc);
+  return EXIT_FAILURE;
+}