Match modes (DIFFERENT RELATIONSHIPS + REPEATABLE ELEMENTS) (#1303)

Note:

- Graphs are not final

Author: JPryce-Aklundh

modules/ROOT/content-nav.adoc

@@ -53,6 +53,7 @@
 ** xref:patterns/variable-length-patterns.adoc[]
 ** xref:patterns/shortest-paths.adoc[]
 ** xref:patterns/non-linear-patterns.adoc[]
+** xref:patterns/match-modes.adoc[]
 ** xref:patterns/reference.adoc[]
 
 * xref:values-and-types/index.adoc[]