fix(cli): handle frontmatter ending with CRLF

On Windows, lines usually end with `\r\n`/CRLF/␍␊.

Although YAML supports this as a line-break, our regex was incorrectly
breaking this up, which was causing the `\r` character to be appending
into some strings, instead of `\r\n`.

packages/cli/src/frontmatter.spec.ts

@@ -0,0 +1,10 @@
+import { describe, expect, it } from 'vitest';
+import { extractFrontMatter } from './frontmatter.js';
+
+describe('extractFrontMatter()', () => {
+  it(String.raw`should handle \r\n (␍␊)`, () => {
+    const text = '---\r\nid: test\r\n---\r\ninfo\r\n';
+    const result = extractFrontMatter(text);
+    expect(result.metadata.id).toBe('test');
+  });
+});

packages/cli/src/frontmatter.ts

@@ -3,7 +3,7 @@
  */
 import { parseDocument, type Document, YAMLMap, isMap } from 'yaml';
 
-const frontMatterRegex = /^-{3}\s*[\n\r](.*?)[\n\r]-{3}\s*[\n\r]+/s;
+const frontMatterRegex = /^-{3}\s*[\n\r](.*?[\n\r])-{3}\s*[\n\r]+/s;
 const urlIDRegex = /(?<baseURL>.*)\/d\/(?<documentID>[\w-]+)/;
 
 type UrlID = `${string}/d/${string}`;