docs: Create README for Agency Identity Service contributions

Added a README for contributing to the Agency Identity Service Subgroups, including meeting details for the Subject Context Transfer Subgroup.

Signed-off-by: mayannuz <mayannuz@cisco.com>

Author: mayannuz

docs/contribute/wip/README.md

@@ -0,0 +1,28 @@
+# Contribute to the Agency Identity Service Subgroups
+
+Thanks for your interest in contributing to `AGNTCY Identity Service Subgroups (SGs)`.
+These SGs target specific problems within the `AGNTCY Identity Service Working Group`.
+Please choose the subgroup(s) that you are interested on, join their recurrent calls, and contribute.
+
+++++++++++++++++++++++++++
+
+## 2) Subject Context Transfer Subgroup
+
+### Meeting Details
+
+Frequency: Biweekly, occurs on Monday, 24 November 2025 from 18:00 to 19:00 CET, i.e., from 09:00 to 10:00 AM PST 
+
+[Meeting Invite Link](https://cisco.webex.com/cisco/j.php?MTID=m6e0f3ac2dbe52d06f3e151d170cef877)
+
+Meeting number (access code): 2664 131 3282
+Meeting password: CEnhFVXR333 (23643897 when dialing from a phone)
+
+Join by phone  
++1-408-525-6800 Call-in toll number (US/Canada)  
+[Global call-in numbers](https://cisco.webex.com/cisco/globalcallin.php?MTID=m3f43df4eeffaaa3fae79b09be1eb3cbe)
+ 
+Join from a video system or application
+Dial 26641313282@webex.com
+You can also dial 173.243.2.68 and enter your meeting number.
+
+++++++++++++++++++++++++++