system/trace: support binary dump of noteram

[Kaben123]

This patch adds support for dumping binary contents from noteram via the
trace dump -b <file> command. Changes include:

• Add a binary parameter to trace_dump() and the public header
  system/trace/trace.h to indicate binary output mode.
• Update trace_dump() to set the noteram read mode to binary using
  NOTERAM_SETREADMODE when requested.
• Update trace dump CLI parsing in system/trace/trace.c to accept
  the -b flag and pass it through to trace_dump().
• Update usage/help text to include the new -b option.

Note: Please adhere to Contributing Guidelines.

Summary

This PR adds support for dumping binary noteram contents from the trace
utility. A new -b option is provided to trace dump to emit the raw
binary data instead of the human-readable text format.

What I changed

• system/trace/trace.h: updated prototype int trace_dump(FILE *out, bool binary);
• system/trace/trace.c: parse -b option for trace dump and pass the
  flag to trace_dump(); update usage text.
• system/trace/trace_dump.c: when binary mode is requested, set the
  noteram read mode to NOTERAM_MODE_READ_BINARY via ioctl NOTERAM_SETREADMODE.

Files modified

• system/trace/trace.h
• system/trace/trace.c
• system/trace/trace_dump.c

Impact

• Adds new capability to export raw noteram binary data.
• Backwards compatible: text dump behavior remains unchanged when -b
  is not specified.
• Low risk; only affects the trace utility and noteram read mode usage.

Testing

• Run nsh> trace dump -b /tmp/trace.bin and verify the produced file
  contains binary data as expected.
• Run nsh> trace dump /tmp/trace.txt to verify the original text output.
• Build and run the trace utility on a target with noteram support.