chore: migrate src to solutions

solutions/07_miniproj/oled/ssd1306.h

@@ -0,0 +1,13 @@
+#pragma once
+#ifndef SSD1306_H
+#define SSD1306_H
+
+#include <stdint.h>
+
+int  ssd1306_init();
+void ssd1306_set_position (uint32_t column, uint32_t row);
+void ssd1306_putc(char c);
+void ssd1306_puts(const char* str);
+void ssd1306_clear_display();
+
+#endif