Create yaml and changelog.mdx for BYOIP

Author: RebeccaTamachiro

src/content/changelogs/byoip.yaml

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+---
+link: "/byoip/changelog/"
+productName: BYOIP
+productLink: "/byoip/"
+productArea: Core platform
+productAreaLink: /fundamentals/reference/changelog/performance/
+entries:
+  - publish_date: "2024-07-02"
+    title: Address Maps for BYOIP and Static IPs
+    description: Address Maps is available via [API](/api/operations/ip-address-management-address-maps-list-address-maps) and via [dashboard](https://dash.cloudflare.com/?to=/:account/ip-addresses/proxy-ips). Address Maps allows customers with BYOIP prefixes or account-level Static IPs to specify which IP addresses should be mapped to DNS records when they are proxied through Cloudflare. Refer to the [documentation](/byoip/address-maps/) for details.

src/content/docs/byoip/changelog.mdx

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+---
+pcx_content_type: changelog
+title: Changelog
+changelog_file_name:
+  - byoip
+sidebar:
+  order: 15
+---
+
+import { ProductChangelog } from "~/components";
+
+{/* <!-- Actual content lives in /src/content/changelogs/byoip.yaml. Update the file there for new entries to appear here. For more details, refer to https://developers.cloudflare.com/style-guide/documentation-content-strategy/content-types/changelog/#yaml-file --> */}
+
+<ProductChangelog />