[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

Translations/objcopy.py

@@ -0,0 +1,25 @@
+import os
+import subprocess
+import tempfile
+
+
+if "OBJCOPY" in os.environ:
+    OBJCOPY = os.environ["OBJCOPY"]
+else:
+    OBJCOPY = "objcopy"
+
+
+def get_binary_from_obj(objfile_path: str, section_name: str) -> bytes:
+    tmpfd, tmpfile = tempfile.mkstemp()
+    result = subprocess.run(
+        [OBJCOPY, "-O", "binary", "-j", section_name, objfile_path, tmpfile]
+    )
+    result.check_returncode()
+    with open(tmpfd, "rb") as f:
+        bin: bytes = f.read()
+    os.remove(tmpfile)
+    return bin
+
+
+def cpp_var_to_section_name(var_name: str) -> str:
+    return f".rodata._ZL{len(var_name)}{var_name}"