Added proxy support section in oc-mirror v2

Author: subhtk

disconnected/mirroring/about-installing-oc-mirror-v2.adoc

@@ -100,6 +100,9 @@ include::modules//oc-mirror-enclave-support-about.adoc[leveloffset=+1]
 // How to mirror to an Enclave
 include::modules/oc-mirror-enclave-support.adoc[leveloffset=+2]
 
+// Proxy support
+include::modules/oc-mirror-proxy-support.adoc[leveloffset=+1]
+
 [role="_additional-resources"]
 .Additional resources
 * xref:../../disconnected/updating/disconnected-update-osus.adoc#updating-disconnected-cluster-osus[Updating a cluster in a disconnected environment using the OpenShift Update Service]

modules/oc-mirror-proxy-support.adoc

@@ -0,0 +1,9 @@
+// Module included in the following assemblies:
+//
+// * installing/disconnected_install/installing-mirroring-disconnected-v2.adoc
+
+:_mod-docs-content-type: CONCEPT
+[id="oc-mirror-proxy-support_{context}"]
+= oc-mirror plugin v2 support proxy setting
+
+The oc-mirror plugin v2 can operate in a proxy-configured environment. The plugin can use system proxy settings to retrieve images for {product-title}, Operator catalog, and the `additionalImages` registry.