Add an overview comment about how the analysis phase works and some pointers to it.

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MOS_MIGRATED_REVID=122718503
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/ConfiguredAspect.java b/src/main/java/com/google/devtools/build/lib/analysis/ConfiguredAspect.java
index 7f3db2a..402668a 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/ConfiguredAspect.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/ConfiguredAspect.java
@@ -44,6 +44,12 @@
  * added.
  *
  * <p>Aspects are created alongside configured targets on request from dependents.
+ *
+ * <p>For more information about aspects, see
+ * {@link com.google.devtools.build.lib.packages.AspectClass}.
+ *
+ * @see com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory
+ * @see com.google.devtools.build.lib.packages.AspectClass
  */
 @Immutable
 public final class ConfiguredAspect implements Iterable<TransitiveInfoProvider> {