style(template): enforce no first-line indent for table styles; default PDF indent 2em

- Set first-line-indent: 0 on all TABLE styles in default/review docx templates
  to prevent table cells from inheriting Normal paragraph indentation.
- Set default PDF template body first-line-indent to 2em (all: true).
- Change default PDF bookmark depth from 1 to 2 in CLI and build_pdf.
- Extend docx post-processing to copy Normal style typography from reference-doc,
  format headings/references, and handle BodyText paragraphs.

bin/commands/convert.py

@@ -33,7 +33,7 @@ from bin.utils import handle_errors, run_command
 @click.option(
     "--bookmark-depth",
     type=int,
-    default=1,
+    default=2,
     help="PDF bookmark expansion depth (md→pdf only). 1=top-level only, 2=expand to second level, etc.",
 )
 @click.option("--dry-run", "-n", is_flag=True, help="Show what would be done")