Add NPEP for new CIDR object peer

Signed-off-by: Surya Seetharaman <[email protected]>

Author: tssurya

npeps/npep-182-cidr-object-peer.md

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+# NPEP-182: Add new CIDR object peer for northbound traffic
+
+* Issue: [#182](https://github.com/kubernetes-sigs/network-policy-api/issues/182)
+* Status: Provisional
+
+## TLDR
+
+This NPEP proposes adding support for a new CIDR object peer type for
+cluster egress (northbound) traffic control that can be referred in the
+`AdminNetworkPolicy` and `BaselineAdminNetworkPolicy` API objects using selectors.
+NPEP-126 already adds support for inline CIDR peer type directly on the
+`AdminNetworkPolicy` and `BaselineAdminNetworkPolicy` API objects. This NPEP proposes
+adding more extensibility by add a new CIDR object in addition to that so that
+users can choose either of these methods based on their needs.
+
+## Goals
+
+
+
+## Non-Goals
+
+
+## Introduction
+
+### User Stories for egress traffic control towards external destinations
+
+
+
+## API
+
+(... details, can point to PR with changes)
+
+
+## Alternatives
+
+(List other design alternatives and why we did not go in that
+direction)
+
+## References
+