The release notes used to be an appendix in the manual. After
converting to markdown that appendix got lost. This commit
reintroduces the release notes into the manual.
The example is missing a `;` which causes this error when you attempt
a `darwin-rebuild switch`.
```
error: syntax error, unexpected '=', expecting ';'
at /Users/968713/.nixpkgs/darwin-configuration.nix:17:30:
16| }
17| home-manager.users.eve = { pkgs, ... }: {
| ^
18| home.packages = [
```
The `optionsDocBook` function is deprecated in nixpkgs since
nixos-23.11. This commit updates the manual and manpages to
use commonmark formatted documentation instead of the deprecated
docbook format.
