Dev (#1)

Reviewed-on: #1

src/export.rs

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+// SPDX-License-Identifier: Prosperity-3.0.0
+// Copyright Scientific Computing Studio
+// Source: https://git.scient.ing/education/coursebank
+
+//! Turning course data into documents.
+//!
+//! | Module | Produces | For |
+//! |:--|:--|:--|
+//! | [`qti`] | a QTI 1.2 zip | importing into Canvas |
+//! | [`typst`] | `.typ` source | a printed exam, answer key, and bubble sheet |
+//! | [`report`] | Markdown and HTML | students, and yourself |
+//!
+//! [`qti`] and [`typst`] share one rule that is easy to get wrong: a form's answer
+//! key must be generated from the same permutation that produced its question
+//! paper. Both derive option order from the form's recorded seed rather than
+//! storing it, so every export of form B agrees with every other.
+//!
+//! [`report`] writes two documents with different content, not different tones. The
+//! student report answers "what should I do next?" and deliberately omits correct
+//! answers, other students' data, and any numeric rank.
+//! The instructor report answers "what should I fix?" and holds the item statistics.
+
+pub mod qti;
+pub mod report;
+pub mod typst;