docs: switch to code syntax for parsing examples

[datamweb]

Description
Some template tags, such as {+ siteURL "login" +}, had extra quotation marks that caused parsing errors. We've resolved this by switching to code syntax for examples, ensuring correct interpretation and execution of the tags.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[michalsn]

I don't recall ever using plug-ins. Do I understand correctly that quotation marks are entirely disallowed around plugin parameters?

[michalsn]

I've reviewed the source code of the plugins, and quotes are IMO recommended.

The issue seems to arise when copying examples from the user guide, where quotes are formatted as curly or smart quotes, which aren't parsed correctly in PHP.

We should consider using code syntax for our examples rather than plain text. This should resolve the issue.

[datamweb]

We should consider using code syntax for our examples rather than plain text.

You were right. It's fixed now.