ts_31_102: Add shell command for GET IDENTITY

GET IDENTITY is used in the "SUCI computation on USIM" feature.

Change-Id: I619d397900dbd6565f8f46acdabcee511903830c
diff --git a/docs/shell.rst b/docs/shell.rst
index cce790a..e13d054 100644
--- a/docs/shell.rst
+++ b/docs/shell.rst
@@ -566,6 +566,12 @@
    :module: pySim.ts_31_102
    :func: ADF_USIM.AddlShellCommands.envelope_sms_parser
 
+get_identity
+~~~~~~~~~~~~
+.. argparse::
+   :module: pySim.ts_31_102
+   :func: ADF_USIM.AddlShellCommands.get_id_parser
+
 
 File-specific commands
 ----------------------