Overload font::print text argument for both std::string and const char*

Turns out I was overplaying my hand a little when changing font::print
from std::string to const char*, so instead, I'll overload the
function: it can take either a const char* (the main function) or a
std::string (a wrapper). This means any C string that's printed
everywhere else (which is common, especially because loc::gettext gives
them) no longer needs to be converted to a std::string object each call.

   Commit 1/3: font::print_wrap
-> Commit 2/3: font::print
   Commit 3/3: font::len

desktop_version/src/Font.h

@@ -84,6 +84,15 @@ bool glyph_dimensions(uint32_t flags, uint8_t* glyph_w, uint8_t* glyph_h);
 int len(uint32_t flags, const std::string& t);
 int height(const uint32_t flags);
 
+void print(
+    uint32_t flags,
+    int x,
+    int y,
+    const char* text,
+    uint8_t r, uint8_t g, uint8_t b
+);
+
+// std::string overload for only font::print (use .c_str() for the others)
 void print(
     uint32_t flags,
     int x,