OOK transmit is mostly working, bit durations are wrong

Simplified messages carrying data (uses shared_memory instead)
Added SymField widget (bitfield, symbol field...)
Added some space for baseband code
BMP palette loading bugfix

firmware/common/spi_image.hpp

@@ -103,16 +103,16 @@ struct region_t {
 
 constexpr region_t bootstrap {
 	.offset = 0x00000,
-	.size = 0x8000,
+	.size = 0x10000,
 };
 
 constexpr region_t images {
-	.offset = 0x8000,
-	.size = 0x38000,
+	.offset = 0x10000,
+	.size = 0x40000,
 };
 
 constexpr region_t application {
-	.offset = 0x40000,
+	.offset = 0x80000,
 	.size = 0x40000,
 };