Fresh 2 support

[ggodet-bar]

This PR adds a freshPlugin that acts as a middleware for detecting languages and applying translations, in the context of the Fresh 2.x framework.

Checklist

• only relevant code is changed (make a diff before you submit the PR)
• run tests npm run test
• tests are included
• commit message and code follows the Developer's Certification of Origin

Checklist (for documentation change)

• only relevant documentation part is changed (make a diff before you submit the PR)
• motivation/reason is provided
• commit message and code follows the Developer's Certification of Origin

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	preact-render-to-string@​6.6.3
	preact@​10.27.2

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[adrai]

why are all these new dependencies necessary?

[adrai]

btw: what's about these other tests?

addRoute.fresh.js
getResourcesHandler.fresh.js
missingKeyHandler.fresh.js