After the changes to the `lang-none` styling in #41335, code snippets marked with
```
language="none" class="code-shell"
```
were being styled with the same foreground and background colours.
It turns out that most of these ought to be marked `language="sh"`
in which case the `code-shell` style became redundant and has been
removed.
Fixes#41984
PR Close#41994
With this change we update the strict mode documentation to reflect the
changes done in the CLI. (https://github.com/angular/angular-cli/pull/18931)
Changes effect
- Removing `no-any` tslint rule
- The special sideEffects package.json
- Added `strictTemplates` NGC option
PR Close#39054