feat(dmr): add receive frontend and AMBE adapter

tests/dmr_bindings_test.pas

@@ -0,0 +1,31 @@
+program dmr_bindings_test;
+
+{$MODE Delphi}
+
+uses
+  SysUtils, DMRBindings;
+
+var
+  Decoder: Pointer;
+  Bits: array[0..DMR_AMBE_BITS - 1] of Byte;
+  PCM: array[0..DMR_PCM_SAMPLES - 1] of Single;
+  Info: TDMRMbeResult;
+begin
+  if not DMRLoad then
+  begin
+    WriteLn(DMRLastError);
+    Halt(1);
+  end;
+  Decoder := DMRMbeCreate(3);
+  if Decoder = nil then Halt(2);
+  try
+    FillChar(Bits, SizeOf(Bits), 0);
+    Bits[0] := 2; // ABI must reject values other than 0/1 before mbelib.
+    if DMRMbeDecode(Decoder, @Bits[0], @PCM[0], @Info) <> -2 then Halt(3);
+    DMRMbeReset(Decoder);
+  finally
+    DMRMbeDestroy(Decoder);
+    DMRUnload;
+  end;
+  WriteLn('DMR native bindings tests passed');
+end.