[RFC] Multi-language firmware (second try) (#941)

* Impl. sectioned font table in firmware

* make_translation.py: Extract build_symbol_conversion_table function

* Put translation indices and strings in a struct

* Move translation objcopy step to Python

* Impl. multi-language firmware demo

* Impl. strings-compressed multi-lang firmware demo

* Add font compression to multi-lang demo

* Refactor Makefile a bit

* Fix rules for make < 4.3

* Add more multi-lang groups

* Add Pinecil multi-lang CI build

* Add lzfx compression license text

* Remote multi-language demo group

* Fix build after merge

* Import code from BriefLZ

* Change brieflz for our use case

* Change compression to use brieflz

* Remove lzfx code

* Update license file for brieflz

* Exclude brieflz files from format check

* Add BriefLZ test

source/Core/Inc/Settings.h

@@ -10,7 +10,7 @@
 #ifndef SETTINGS_H_
 #define SETTINGS_H_
 #include <stdint.h>
-#define SETTINGSVERSION (0x29)
+#define SETTINGSVERSION (0x2A)
 /*Change this if you change the struct below to prevent people getting \
           out of sync*/
 
@@ -59,6 +59,7 @@ typedef struct {
   uint8_t  hallEffectSensitivity;          // Operating mode of the hall effect sensor
   uint8_t  accelMissingWarningCounter;     // Counter of how many times we have warned we cannot detect the accelerometer
   uint8_t  pdMissingWarningCounter;        // Counter of how many times we have warned we cannot detect the pd interface
+  char     uiLanguage[8];                  // Selected UI Language code, null-terminated *only if* the length is less than 8 chars
 
   uint32_t padding; // This is here for in case we are not an even divisor so
                     // that nothing gets cut off