fix: add html unescape in hydrated data

[siesdart]

Description

In Jaspr, data is escaped and sent to the client while hydrating. However, there is no unescape process in the client now, so data which contain escapable characters like '&' is different from the server's original on the client. I fixed this by adding unescape progress in the client.

Type of Change

• 🛠️ Bug fix

Ready Checklist

• I've read the Contribution Guide.
• In case this PR changes one of the core packages, I've modified the respective CHANGELOG.md file using
  the semantic_changelog format.
• I updated/added relevant documentation (doc comments with ///).
• I added myself to the AUTHORS file (optional, if you want to).

[github-actions]

Package Version Report

The following packages have been updated:
jaspr : 0.13.3 -> 0.13.4
jaspr_builder : 0.13.3 -> 0.13.4
jaspr_cli : 0.13.3 -> 0.13.4
jaspr_tailwind : 0.2.0 -> 0.2.1
jaspr_test : 0.13.3 -> 0.13.4

[schultek]

I indeed missed the unescaping. However this can be a simple string replace operation since the only things that are escaped are

• & to &
• < to <
• > to >

So something like str.replaceAll('&lt;', '<').replaceAll('&gt;', '>').replaceAll('&amp;', '&) or some more optimized version of that.

[siesdart]

I modified the code as you said. Does it look better?

[schultek]

I changed the order so it doesn't affect itself. but then LGTM.

Thanks for this pr.