Version 1.2.0

• Add @inherits <name>, for recording which page a page derives from.
  Panel and class pages now show their parent as a link: to that page when it
  is documented, and to the Garry's Mod wiki when it is not, so an inheritance
  chain can be followed by clicking through it.
• Fix @tparam[opt] being silently swallowed into the description. A tag name
  may now be followed by a bracketed modifier, so the LDoc-style optional
  marker is recognised instead of ending the tag scan.
• Parameters marked [opt] are now flagged optional in the docs, and
  [opt=<value>] carries its default through to the signature.

⚠️ Behaviour change

Any tag name followed by [ is now parsed as a tag. Text such as @foo[bar]
that previously fell through to the description will now be reported as an
unknown tag.