Add Administration user management: list, password reset, email change, group assignments

Wires the previously-unused fis_admin_* user/group stored procs into the Admin
module (fds_sys-gated), adds a users grid with a per-row ribbon (reset
password, change email, manage group membership), and always emails a
password reset result to the user rather than showing it to the admin.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Fuchs_Database/FuchsDatabase.sqlproj

@@ -223,6 +223,7 @@
     <Build Include="dbo\Functions\json_diffObjectArrays.sql" />
     <Build Include="dbo\Functions\json_compareObjectArrays.sql" />
     <Build Include="dbo\Functions\fis_getONEPersonWidgets.sql" />
+    <Build Include="dbo\Functions\fis_admin_getUserGroupMembership.sql" />
     <Build Include="dbo\Functions\fis_admin_getUserGroupList.sql" />
     <Build Include="dbo\Functions\fis_admin_getUserAccountList.sql" />
     <Build Include="dbo\Functions\fis_admin_getUserAccount_Namelist.sql" />