docs(website): fill the six Reference stubs with worked examples + output

Expand columns, relationships, indexes, constraints, inserting-and-editing-
data, and querying-and-inspecting from syntax-only stubs into full pages,
each with worked examples on the library schema and real captured app output
(structure boxes, relationship diagrams, data tables, show-lists, query
plans, cascade summaries). All output captured verbatim from the app — never
hand-drawn. Both simple- and advanced-mode forms shown where both apply;
advanced syntax verified against tests/source.

STYLE.md: record the output-block convention (plain unlabelled fence,
captured from a throwaway harness, not hand-drawn).

Verified: pnpm build clean (24 pages); no forbidden terms; internal links
and heading anchors resolve.

website/STYLE.md

@@ -104,6 +104,17 @@ This is planned and not yet available.
 - **One command per line** in an `rdbms` block; a multi-line single
   statement (e.g. advanced `CREATE TABLE`) belongs in a ` ```sql ` block,
   where no prompt is added.
+- **Command output → a plain unlabelled ` ``` ` fence** placed immediately
+  after the command block (no language, so no `> ` prompt and no
+  highlighting). Output must be **captured from the real app**, never
+  hand-drawn — box-drawing diagrams, query-plan trees, and data tables are
+  copied verbatim (trailing padding spaces trimmed). The capture method: a
+  throwaway in-crate test that builds the canonical library schema and prints
+  the rendered output (`render_structure_with_diagrams`,
+  `render_relationship_diagram`, `render_data_table`, `render_explain_plan`,
+  `show_list`), removed once the output is pasted. Colour is lost in a static
+  block (the structure still reads); the coloured/animated rendering is
+  earmarked for casts.
 
 ### Canonical library schema (source of truth for examples)