Code improvements / Fix warnings

- Fix CodeQL warnings
- Port lots of improvements/fixes from PR #225
- replace 'array_hexstr' and '%*H' format by sdk function 'format_hex'
- Add 'noreturn' attribute in 'main.c'

src_bagl/ui_flow_getEth2PublicKey.c

@@ -2,9 +2,13 @@
 
 #include "shared_context.h"
 #include "ui_callbacks.h"
+#include "uint_common.h"
 
 void prepare_eth2_public_key() {
-    snprintf(strings.tmp.tmp, 100, "0x%.*H", 48, tmpCtx.publicKeyContext.publicKey.W);
+    bytes_to_string(strings.tmp.tmp,
+                    sizeof(strings.tmp.tmp),
+                    tmpCtx.publicKeyContext.publicKey.W,
+                    48);
 }
 
 // clang-format off