[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/Translation_multi.h

@@ -0,0 +1,42 @@
+#ifndef TRANSLATION_MULTI_H_
+#define TRANSLATION_MULTI_H_
+
+#include "Translation.h"
+
+// The compressed translation data will be decompressed to this buffer. These
+// data may include:
+//  - TranslationData (translation index table and translation strings)
+//  - Font table(s)
+// The translation index table consists of uint16_t (half words) which has a
+// 2-byte alignment. Therefore, the declaration of this buffer must include
+// the alignment specifier `alignas(TranslationData)` to satisfy its alignment.
+// TranslationData must always be decompressed to the start of this buffer.
+extern uint8_t        translation_data_out_buffer[];
+extern const uint16_t translation_data_out_buffer_size;
+
+struct FontSectionDataInfo {
+  uint16_t symbol_start;
+  uint16_t symbol_count;
+  uint16_t data_size : 15;
+  bool     data_is_compressed : 1;
+
+  // Font12x16 data followed by font6x8 data
+  const uint8_t *data_ptr;
+};
+
+extern const FontSectionDataInfo FontSectionDataInfos[];
+extern const uint8_t             FontSectionDataCount;
+
+extern FontSection DynamicFontSections[];
+
+struct LanguageMeta {
+  char           code[8];
+  const uint8_t *translation_data;
+  uint16_t       translation_size : 15;
+  bool           translation_is_compressed : 1;
+};
+
+extern const LanguageMeta LanguageMetas[];
+extern const uint8_t      LanguageCount;
+
+#endif /* TRANSLATION_MULTI_H_ */