Add MdBook generation script and precommit hook

.pre-commit-config.yaml

@@ -12,3 +12,10 @@ repos:
       - id: cargo-check
       - id: clippy
         args: ["--", "-D", "warnings"]
+  - repo: local
+    hooks:
+      - id: mdbook
+        name: mdbook
+        entry: book/generate.sh
+        language: script
+        files: ^book/.*

book/generate.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+set -euo pipefail
+
+cd "$(git rev-parse --show-toplevel)/book"
+
+cargo run obsidian-src book-src
+mdbook build
+cp book-src/README.md ../README.md