move examples into package (include them in published crate)

crates/servicepoint_binding_c/examples/lang_c/src/lib.rs

@@ -0,0 +1 @@
+

crates/servicepoint_binding_c/examples/lang_c/src/main.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include "servicepoint.h"
+
+int main(void) {
+    sp_Connection *connection = sp_connection_open("localhost:2342");
+    if (connection == NULL)
+        return 1;
+
+    sp_PixelGrid *pixels = sp_pixel_grid_new(sp_PIXEL_WIDTH, sp_PIXEL_HEIGHT);
+    sp_pixel_grid_fill(pixels, true);
+
+    sp_Command *command = sp_command_bitmap_linear_win(0, 0, pixels, Uncompressed);
+    sp_Packet *packet = sp_packet_from_command(command);
+    if (!sp_connection_send(connection, packet))
+        return 1;
+
+    sp_connection_dealloc(connection);
+    return 0;
+}