Initial documentation for the plugin package

pkg/analyzer_plugin/doc/tutorial/tutorial.md

Index: pkg/analyzer_plugin/doc/tutorial/tutorial.md
diff --git a/pkg/analyzer_plugin/doc/tutorial/tutorial.md b/pkg/analyzer_plugin/doc/tutorial/tutorial.md
new file mode 100644
index 0000000000000000000000000000000000000000..255137fbd8ac2b37761de986e2d849f0d7c4c576
--- /dev/null
+++ b/pkg/analyzer_plugin/doc/tutorial/tutorial.md
@@ -0,0 +1,30 @@
+# Building a Plugin
+
+This is the introduction page to a set of pages that describe how to implement a
+plugin. You should probably read the [Getting Started][gettingStarted] page
+first, but there is no specific order for the remaining pages.
+
+## Pages
+
+The following is a list of the pages available in this tutorial.
+
+[Getting Started][gettingStarted] -
+How to write a minimal plugin.
+
+[Creating Edits][creatingEdits] -
+How to compose the edits used in assists, fixes, and refactorings.
+
+[Providing Quick Assists][assists] -
+How to provide quick assists.
+
+[Providing Quick Fixes][fixes] -
+How to provide quick fixes associated with errors.
+
+[Providing Code Completions][completion] -
+How to provide code completion suggestions.
+
+[assists]: assists.md
+[completion]: completion.md
+[creatingEdits]: creating_edits.md
+[fixes]: fixes.md
+[gettingStarted]: getting_started.md