chore: snippets missing documentation on use, not showing in ctrl+space menu, snippets design, sidebar docs

[carafelix]

• add more clear documentation to snippet usage
• add snippets list in the grammy sidebar menu
• add snippets to show in the ctrl+space menu inside the text editor
• add toggleable snippets for most used / popular pluggins
  example: if using and toggle the commands plugin, instead of bot.command etcetc,
  should do (on every word it means the cursor-tab write selection thing)

_commandsName_.command('_name_', '_description_', (ctx) => { ctx._method_ (_cursorEndsHere_)} )

example2:

const _menu_ = new Menu("_my-menu-identifier_")
  ._text_(_cursorEndsHere_)

• improve snippet flexibility using tab write to ctx.method instead of fixed ctx.reply('example')

"body": [
      "bot.command('${1:command}', (ctx) => {",
      "",
      "ctx._method_(_cursorEndsHere_),
      "});",
     ]

-[ ] add to the grammy sidebar menu a tab for checking / unchecking the plugins you are using, so the snippets change based on that? In the same list it could have a links to the docs for that plugin?

I'll do a pr when I have time