snippets: Add SystemView RTT tracing snippet

Adds a new snippet to enable tracing with SEGGER SystemView and RTT.

Signed-off-by: Maureen Helm <maureen.helm@analog.com>

snippets/rtt-tracing/README.rst

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+.. _snippet-rtt-tracing:
+
+SystemView RTT Tracing Snippet (rtt-tracing)
+############################################
+
+.. code-block:: console
+
+   west build -S rtt-tracing [...]
+
+Overview
+********
+
+This snippet enables SEGGER SystemView RTT support with the tracing subsystem.
+
+Requirements
+************
+
+Hardware support for:
+
+- :kconfig:option:`CONFIG_HAS_SEGGER_RTT`

snippets/rtt-tracing/rtt-tracing.conf

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+# Copyright (c) 2024 Analog Devices, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_USE_SEGGER_RTT=y
+
+CONFIG_DEBUG_OPTIMIZATIONS=n
+CONFIG_DEBUG_THREAD_INFO=y
+
+CONFIG_TRACING=y
+CONFIG_SEGGER_SYSTEMVIEW=y
+CONFIG_SEGGER_SYSTEMVIEW_BOOT_ENABLE=n
+CONFIG_SEGGER_SYSVIEW_POST_MORTEM_MODE=n

snippets/rtt-tracing/snippet.yml

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+# Copyright (c) 2024 Analog Devices, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+name: rtt-tracing
+append:
+  EXTRA_CONF_FILE: rtt-tracing.conf