Change tutorial titles for better sidenav order (#553)

* Change tutorial titles for better sidenav order

* Add custom page list of tuts on bottom

I cannot figure it out but it seems no page in the theme responds to
`suppresstopiclist.enabled, where true or false, or other relevant
settings from upstream themes.

Author: aj-stein-nist

website/content/tutorials/1-getting-started/_index.md

@@ -1,5 +1,5 @@
 ---
-title: "Getting Started with Metaschema"
+title: "Tutorial #1: Getting Started with Metaschema"
 description: ""
 ---
 

website/content/tutorials/2-constraints/_index.md

@@ -1,5 +1,5 @@
 ---
-title: "Using Constraints"
+title: "Tutorial #2: Using Constraints"
 description: ""
 ---
 

website/content/tutorials/3-constraints-expect/_index.md

@@ -1,5 +1,5 @@
 ---
-title: "Complex Constraints: expect"
+title: "Tutorial #3: Complex Constraints: expect"
 description: ""
 ---
 

website/content/tutorials/4-constraints-matches/_index.md

@@ -1,5 +1,5 @@
 ---
-title: "Complex Constraints: matches"
+title: "Tutorial #4: Complex Constraints: matches"
 description: ""
 ---
 

website/content/tutorials/_index.md

@@ -7,8 +7,11 @@ menu:
     weight: 10
 ---
 
-# Tutorials
+# Learning Metaschema by example
 
 The following tutorials provide walk-throughs for developers to understand Metaschema, its use cases, and how to use or develop news to exercise them.
 
-- [Getting Started with Metaschema](1-getting-started/): Introduces the basics of Metaschema-based modeling using a "computer" model as an example.
+- [Tutorial #1:: Getting Started with Metaschema](1-getting-started/): Introduces the basics of Metaschema-based modeling using a "computer" model as an example.
+- [Tutorial #2: Using Constraints](2-constraints/): Introduces Metaschema constraints and how to use them for more precise control for values in model-based document instances.
+- [Tutorial #3: Complex Constraints: expect](3-constraints-expect/): Introduces advanced usage of Metaschema constraints, specifically `expect` and its common use cases.
+- [Tutorial #4: Complex Constraints: matches](4-constraints-matches/): Introduces advanced usage of Metaschema constraints, specifically `matches` and common its use cases.