* Now also supports setting a custom metatable (replacement of
index.defineTag)
* Load tag.define API on boot so can be used for initial client index
from CONFIG
* Docs and examples
- Enhanced the `Config.md` documentation to clarify built-in configuration options and the use of the `config.set` API.
- Removed outdated `Page Template.md` and `Slash Template.md` files to streamline documentation and avoid confusion.
- Updated references in various documentation files to reflect the removal of deprecated templates and ensure consistency across the site.