docs: add rebase review walkthrough

config/conflict.txt

@@ -1 +1 @@
-baseline
+master selects fixture B

config/feature-toggle.json

@@ -0,0 +1 @@
+{"demoEnabled":false}

docs/batch-change-1.md

@@ -0,0 +1,2 @@
+# Demo change 1
+Round 1

docs/batch-change-2.md

@@ -0,0 +1,2 @@
+# Demo change 2
+Round 1

docs/batch-change-3.md

@@ -0,0 +1,2 @@
+# Demo change 3
+Round 1

docs/obsolete-demo.md

@@ -0,0 +1 @@
+# Obsolete demo file

docs/rebase-review.md

@@ -0,0 +1,7 @@
+# Rebase review walkthrough
+
+This synthetic change demonstrates a feature branch rebased and merged through a pull request.
+
+- Review the focused documentation diff.
+- Confirm the pull request records the rebase merge method.
+- Keep this fixture separate from production release notes.

docs/rejected-proposal.md

@@ -1 +0,0 @@
-# Demo rejected proposal

docs/squash-demo.md

@@ -0,0 +1,3 @@
+# Demo squash
+Iteration 1
+Iteration 2