[FL-1800] IRDA: enc/decoder refactoring, Add NEC42 (#705)

* WIP: IRDA: multilen protocol refactoring, NEC42
* IRDA: Refactoring encoder/decoder

Co-authored-by: あく <alleteam@gmail.com>

lib/irda/encoder_decoder/irda_i.h

@@ -4,6 +4,7 @@
 #include <stdint.h>
 
 typedef struct {
+    uint32_t min_split_time;
     uint32_t silence_time;
     uint16_t preamble_mark;
     uint16_t preamble_space;