refactor: restructure mytoolkit with new subcommands and md-to-pdf improvements

- Add new subcommands: convert, preflight, server, templates, webpage
- Migrate config from bin/config.json to ~/.config/mytoolkit
- Fix expand_bookmarks to modify writer objects instead of reader
- Improve md_to_pdf with CJK bookmark support
- Update README and project metadata

bin/cli.py

@@ -1,9 +1,21 @@
 """MyCLI main entry point."""
 
+from pathlib import Path
+
 import click
 
-from bin.commands import pdf, image, latex, video, bib, utils, env_cmd, ssh_cmd, git_cmd, mail
+from bin.commands import pdf, image, latex, video, bib, utils
+from bin.commands.convert import convert_cmd
+from bin.commands.env import env_cmd
+from bin.commands.templates import templates_cmd
+from bin.commands.ssh import ssh_cmd
+from bin.commands.git import git_cmd
+from bin.commands.server import server_cmd
+from bin.commands.webpage import webpage_cmd
+from bin.commands.mail import mail
+from bin.commands.preflight import preflight_cmd
 from bin.commands.self_mgmt import update_cmd, uninstall_cmd, self_cmd
+from bin.utils import handle_errors
 
 
 @click.group()
@@ -14,6 +26,7 @@ def cli():
 
 
 # Register command groups
+cli.add_command(convert_cmd)
 cli.add_command(pdf.pdf)
 cli.add_command(image.image)
 cli.add_command(latex.latex)
@@ -21,9 +34,13 @@ cli.add_command(video.video)
 cli.add_command(bib.bib)
 cli.add_command(utils.utils)
 cli.add_command(env_cmd)
+cli.add_command(templates_cmd)
 cli.add_command(ssh_cmd)
 cli.add_command(git_cmd)
-cli.add_command(mail.mail)
+cli.add_command(server_cmd)
+cli.add_command(webpage_cmd)
+cli.add_command(mail)
+cli.add_command(preflight_cmd)
 cli.add_command(update_cmd)
 cli.add_command(uninstall_cmd)
 cli.add_command(self_cmd)