chore: Make the code-docs index page show the class hierarch - and some other useful lines

Author: claremacrae

src/README-code-docs.md

@@ -0,0 +1,15 @@
+<!-- This file is embedded in the documentation generated by running 'yarn code-docs' -->
+
+# Index
+
+## Useful pages in this machine-generated documentation
+
+- [Class Hierarchy](hierarchy.html)
+- [Modules](modules.html)
+
+## External pages
+
+- [GitHub repository](https://github.com/obsidian-tasks-group/obsidian-tasks)
+- [Contributing Guide](https://publish.obsidian.md/tasks-contributing/)
+- [Structure of the code](https://publish.obsidian.md/tasks-contributing/Code/Structure+of+the+code)
+- [User Guide](https://publish.obsidian.md/tasks/)

tsconfig.json

@@ -45,6 +45,7 @@
   ],
   "typedocOptions": {
     "name": "Tasks plugin",
+    "readme": "src/README-code-docs.md",
     "excludePrivate": false,
     "excludeProtected": false,
     "out": "code-docs",