BREAKING-CHANGES.md: Add initial file

RFC 0003 - "Breaking Change and Release Process for EDK II" defined a
new process for how breaking changes are tracked and documented in
EDK II. This commit adds an empty BREAKING-CHANGES.md file to the root
of the EDK II repository with sections for the current and next two
stable tags so the file can be updated in accordance with the RFC.

I add myself as a reviewer of the file to monitor the initial set of
updates against the RFC process.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

BREAKING-CHANGES.md

@@ -0,0 +1,79 @@
+# EDK II Breaking Changes
+
+This file is the in-tree record of breaking changes in EDK II. Each breaking change has a single entry that is added
+in the pull request that introduces the change and updated in any later pull request that changes its state. The file
+is organized by stable tag milestone with most recent first.
+
+For the full process, including the breaking change taxonomy, deprecation timeline, required entry content, and GitHub
+issue requirements, see the [Breaking Change and Release Process for EDK II](https://raw.githubusercontent.com/tianocore/tianocore-wiki.github.io/refs/heads/main/rfc/text/0003-edk2-breaking-change-and-release-process.md)
+RFC.
+
+## edk2-stable202702
+
+- Milestone: [edk2-stable202702](https://github.com/tianocore/edk2/milestone/7)
+
+### edk2-stable202702: Source-Level Breaking Changes
+
+#### edk2-stable202702: Changes with Removal
+
+None
+
+#### edk2-stable202702: Changes without Removal
+
+None
+
+### edk2-stable202702: Behavioral Breaking Changes
+
+None
+
+### edk2-stable202702: Build-System Breaking Changes
+
+None
+
+---
+
+## edk2-stable202611
+
+- Milestone: [edk2-stable202611](https://github.com/tianocore/edk2/milestone/6)
+
+### edk2-stable202611: Source-Level Breaking Changes
+
+#### edk2-stable202611: Changes with Removal
+
+None
+
+#### edk2-stable202611: Changes without Removal
+
+None
+
+### edk2-stable202611: Behavioral Breaking Changes
+
+None
+
+### edk2-stable202611: Build-System Breaking Changes
+
+None
+
+---
+
+## edk2-stable202608
+
+- Milestone: [edk2-stable202608](https://github.com/tianocore/edk2/milestone/5)
+
+### edk2-stable202608: Source-Level Breaking Changes
+
+#### edk2-stable202608: Changes with Removal
+
+None
+
+#### edk2-stable202608: Changes without Removal
+
+None
+
+### edk2-stable202608: Behavioral Breaking Changes
+
+None
+
+### edk2-stable202608: Build-System Breaking Changes
+
+None

Maintainers.txt

@@ -150,6 +150,10 @@ R: Liming Gao <gaoliming@byosoft.com.cn> [lgao4]
 
 EDK II Contributed Files:
 -------------------------
+Breaking Changes Documentation
+F: BREAKING-CHANGES.md
+R: Michael Kubacki <mikuback@linux.microsoft.com> [makubacki]
+
 VS Code PR Dashboard Notebook
 F: contrib/PullRequests.github-issues
 M: Michael Kubacki <mikuback@linux.microsoft.com> [makubacki]