docs: split project reports, pin checker links

Reading this project's own reports gets its own page. Checker code is linked at the revision each platform list was read from. Installer moves to Your setup, legal to Start here, build internals to Contribute, and Reference pages carry a group.

wiki/reference-terms.md

@@ -1,7 +1,6 @@
 ---
-level: reference
-order: 130
-nav_title: Project terms
+level: contribute
+order: 90
 ---
 
 # Terms of the reference pages
@@ -149,8 +148,8 @@ everyday words (BIOS, emulator, core, hash) are in the [glossary](glossary.md).
     takes a file from (the collection, a data folder, a release asset) is its
     source, not its provenance.
 
-:::tip[Next]
+## Next steps
+
 - [How each platform checks files](verification-modes.md)
-- [Glossary](glossary.md)
-:::
+- [Words used on this site](glossary.md)