term: depreciate rt, and switch to flanterm

kernel/src/rt.h

@@ -1,41 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-
-typedef struct _rt_ctx {
-  // A pointer to the framebuffer.
-  void *framebuffer;
-
-  // The framebuffer width, in pixels.
-  uint32_t framebuffer_width;
-
-  // The framebuffer height, in pixels.
-  uint32_t framebuffer_height;
-
-  // Set this to 1 if you prefer using DOS line endings to UNIX line endings.
-  int use_crlf_ending;
-
-  // Do we need to show a cursor after printing text?
-  int show_cursor;
-
-  // The background color
-  uint32_t bg_color;
-
-  // The foreground color
-  uint32_t fg_color;
-
-  /*
-   * Do NOT modify everything below me!
-   */
-  // The terminal's width, in columns of 8 pixels.
-  int term_width;
-  // The terminal's height, in rows of 16 pixels.
-  int term_height;
-  // The X position of the cursor, in columns of 8 pixels.
-  int x;
-  // The Y position of the cursor, in rows of 16 pixels.
-  int y;
-} rt_context;
-
-void rt_init(rt_context ctx);
-void rt_print(char *str);