TextConsole: Add wide-character overloads for print() and println()

These can't fail from UTF-8 decoding errors.

kernel/src/Log.cpp

@@ -58,16 +58,7 @@ static void log_text_console(LogLevel level, const char* format, va_list origin)
     auto rc = cstyle_format(
         format, [](char c, void*) -> Result<void> { return TextConsole::putchar(c); }, nullptr, ap);
 
-    if (rc.has_error())
+    if (rc.has_error()) { TextConsole::wprint(L"Invalid UTF-8 in log message"); }
-    {
-        // FIXME: Find a way to do this in a simpler way (TextConsole::wprint maybe?)
-        const wchar_t* s = L"Invalid UTF-8 in log message";
-        while (*s)
-        {
-            TextConsole::putwchar(*s);
-            s++;
-        }
-    }
 
     TextConsole::putwchar(L'\n');
 

kernel/src/video/TextConsole.cpp

@@ -172,6 +172,11 @@ namespace TextConsole
         return {};
     }
 
+    void wprint(const wchar_t* str)
+    {
+        while (*str) putwchar(*str++);
+    }
+
     Result<void> println(const char* str)
     {
         TRY(print(str));
@@ -179,6 +184,12 @@ namespace TextConsole
         return {};
     }
 
+    void wprintln(const wchar_t* str)
+    {
+        wprint(str);
+        putwchar(L'\n');
+    }
+
     Result<usize> printf(const char* format, ...)
     {
         va_list ap;

kernel/src/video/TextConsole.h

@@ -14,6 +14,8 @@ namespace TextConsole
     u32 background();
     void move_to(u32 x, u32 y);
     Result<void> print(const char* str);
+    void wprint(const wchar_t* str);
     Result<void> println(const char* str);
+    void wprintln(const wchar_t* str);
     Result<usize> printf(const char* format, ...) _format(1, 2);
 }