* Flash savings: getFileExtension() de-templated, saves 160 bytes
* Flash savings: several variables moved to rodata, RGB macro optimization (speed and can now be used to initialize rodata)
Result for Horus:
text data bss dec
1261182 808603 42020 2111805 before
1267149 803335 42124 2112608 after (data size also counts .sram section)
5kB saved in .data section (RAM and FLASH)
* Removed compiler warnings
* RGB() and ARGB() gtests added
* ARGB() optimized
* [simu] simpgmspace: Populate file date/time/size in f_stat(); Add f_utime(); Fix f_getcwd() on Windows; Fix f_mkdir() build error on Windows.
* [Lua] Add runtime support for script pre-compilation. Changes behavior with LUA_COMPILER (Re: https://github.com/opentx/opentx/issues/3318):
All .lua scripts are now compiled and saved to binary "bytecode" file (.luac extension) upon first execution;
Scripts are also automatically re-compiled if .lua source file is newer than existing .luac file;
The pre-compiled .luac version is loaded if modification time is newer or equivalent to .lua source file;
If a .luac version of a script exists, then the .lua version does not need to be present;
Guards against bytecode compatibility issues (binaries from 64-bit sim will not run on 32-bit sim/radio);
In SIMU and DEBUG builds, the source .lua file is always preferred in order to preserve full debug info (this is is controlled with new LUA_SCRIPT_LOAD_MODE macro, see lua_api.h);
GC is now run after each script is loaded.
* [Lua] Add loadScript() API function as alternative to loadfile() from Lua base. This can take advantage of the new OTx script pre-compilation features to reduce memory footprint when loading functions dynamically. This is an interface to luaLoadScriptFileToState(). Fully documented.
* [SD][Lua] Flexible file extensions support:
Allow for variable length file extensions throughout system (no longer hard-coded in LEN_FILE_EXTENSION);
Fixes issues with renaming files in SD manager which have file extensions longer than ".ext";
Expand general support for multiple file extensions per file type in sdListFiles() (eg. .lua and .luac for scripts);
Lua scripts with .luac extensions can now be selected in custom/telemetry/function menus even if no .lua version exists (duplicates are not shown);
.luac files can now also be executed from SD file manager UI.
* [Build] Added CMake options for LUA_COMPILER and LUA_SCRIPT_LOAD_MODE.
* Cosmetics.
* [SD][gui] Improve efficiency of some file name handling routines in sdmanager GUI and sdListFiles() by extending getFileExtension() function. Use shared isExtensionMatching() in place of isImageFileExtension(). Only allow executing .luac files when LUA_COMPILER defined (as per request).
* [simpgmspace] Fix f_mkdir() for MSVC build and misc. cleanup.
* [Lua] Use getFileExtension() in script loader to determine file type and check for buffer overflow.
* Re #3815: Disk cache: Write statistic added. Bigger disk cache. Show disk cache misses in CLI.
* Update to the latest FatFS R0.12b (all existing OpenTX patches have been already applied in upstream, only few ff.h modifications needed for simulator)
* Missing file
* SD card manager: do not show parent dir [..] for root directory
