Samples: Bluetooth: HF: Move handsfree and handsfree_ag to './classic'

Move `handsfree` and `handsfree_ag` to sub-folder './classic'.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>

Author: lylezhu2012

boards/shields/nxp_m2_wifi_bt/doc/index.rst

@@ -66,7 +66,7 @@ Below are the supported shields to be used with ``--shield <option>`` when you i
 For example:
 
 .. zephyr-app-commands::
-   :zephyr-app: samples/bluetooth/handsfree
+   :zephyr-app: samples/bluetooth/classic/handsfree
    :board: mimxrt1060_evk@C//qspi
    :shield: nxp_m2_1xk_wifi_bt
    :goals: build

doc/_scripts/redirects.py

@@ -230,6 +230,8 @@
     ('samples/bluetooth/broadcast_audio_sink/README', 'samples/bluetooth/bap_broadcast_sink/README'),
     ('samples/bluetooth/broadcast_audio_source/README', 'samples/bluetooth/bap_broadcast_source/README'),
     ('samples/bluetooth/central_iso/README', 'samples/bluetooth/iso_central/README'),
+    ('samples/bluetooth/handsfree/README', 'samples/bluetooth/classic/handsfree/README'),
+    ('samples/bluetooth/handsfree_ag/README', 'samples/bluetooth/classic/handsfree_ag/README'),
     ('samples/bluetooth/peripheral_iso/README', 'samples/bluetooth/iso_peripheral/README'),
     ('samples/bluetooth/public_broadcast_sink/README', 'samples/bluetooth/pbp_public_broadcast_sink/README'),
     ('samples/bluetooth/public_broadcast_source/README', 'samples/bluetooth/pbp_public_broadcast_source/README'),

samples/bluetooth/handsfree/CMakeLists.txt renamed to samples/bluetooth/classic/handsfree/CMakeLists.txt

@@ -18,7 +18,7 @@ Requirements
 Building and Running
 ********************
 
-This sample can be found under :zephyr_file:`samples/bluetooth/handsfree` in
+This sample can be found under :zephyr_file:`samples/bluetooth/classic/handsfree` in
 the Zephyr tree.
 
 See :zephyr:code-sample-category:`bluetooth` samples for details.