OLED Cyrillic Support for v1.3 (#1640)

* Extended ASCII codes and cyrillic support

(cherry picked from commit e977840805d3d14260f917b03a2db957d52ec657)

* Fixed `ё`, `Ё` letters

(cherry picked from commit 2f4a2ccb2f50cab879f4a1002215c176a435bae7)

* Fixed `customFontTableLookup` execution flow

(cherry picked from commit 377f909f36201ba6f7fe4511f631f54b8cb2ab3e)

* [OLED] Specifying the language by defining it in `platformio.ini`

(cherry picked from commit ddd8132b24095556e0b3cd17f1a3b3458bc15c4e)

* [OLED] localization guide

(cherry picked from commit a3267c886f36731c8f123636162a8c2a752a80c4)

* [OLED] Cyrillic support

Localization guide has been moved to https://github.com/meshtastic/Meshtastic/tree/master/docs/developers/Firmware

https://meshtastic.org/docs/developers/Firmware/oled-l10n-guide

Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/graphics/Screen.cpp

@@ -44,6 +44,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "mesh/http/WiFiAPClient.h"
 #endif
 
+#ifdef OLED_RU
+#include "fonts/OLEDDisplayFontsRU.h"
+#endif
+
 using namespace meshtastic; /** @todo remove */
 
 extern bool loadProto(const char *filename, size_t protoSize, size_t objSize, const pb_msgdesc_t *fields, void *dest_struct);
@@ -100,7 +104,11 @@ static uint16_t displayWidth, displayHeight;
 #define FONT_MEDIUM ArialMT_Plain_24
 #define FONT_LARGE ArialMT_Plain_24
 #else
+#ifdef OLED_RU
+#define FONT_SMALL ArialMT_Plain_10_RU
+#else
 #define FONT_SMALL ArialMT_Plain_10
+#endif
 #define FONT_MEDIUM ArialMT_Plain_16
 #define FONT_LARGE ArialMT_Plain_24
 #endif