Major update

- Add an IO system to hijack a bit of the terminal.
- Other minor fixes.

include/internal/theme/theme.h

@@ -5,19 +5,6 @@
 #include "pch.h"
 
 namespace bed::internal::theme {
-struct Highlight {
-  enum : uint8_t {
-    None = 0,
-    Bold = 1 << 0,
-    Italic = 1 << 1,
-    Strikethrough = 1 << 2,
-    Underline = 1 << 3,
-  };
-  uint32_t fg;
-  uint32_t bg;
-  uint8_t flags;
-};
-
 struct Theme {
   std::array<Highlight, internal::syntax::Token::Count> hl;