Created _Sidebar (markdown)

_Sidebar.md

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+# Pages
+
+[Home](https://github.com/spring-projects/spring-framework/wiki)
+
+## General
+
+[[What's New in the Spring Framework]]
+
+[[Downloading Spring artifacts]]
+
+[[Spring repository FAQ]]
+
+[[Building a distribution with dependencies]]
+
+## Migrating from earlier versions
+
+[[Migrating to Spring Framework 5.x]]
+
+[[Migrating to Spring Framework 4.x]]
+
+[[Migrating to Spring Framework 3.x]]
+
+## Development
+
+[[Contributor guidelines]]
+
+[[The lifecycle of an issue]]
+
+[[Spring Framework Code Style]]
+
+[[Manually merging pull requests]]
+
+## Concepts
+
+[[Spring Annotation Programming Model]]
+
+## Release process
+
+[[Gradle build and release FAQ]]
+
+[[autorepo version updating]]