Support externalising attachments in HTML formatter

[davidjgoss]

🤔 What's changed?

• Updates HTML formatter version (brings in support for externalised attachments, links)
• Adds option to externalise attachments for HTML formatter, with code to rewrite most attachment messages accordingly if on
  • The exceptions are logs and links, which being short (and with logs potentially numerous) would have little or no value being externalised
• Adds link function on the world for adding links to URLs as attachments

⚡️ What's your motivation?

The cucumber-js version of both

• Support for having large attachments saved externally to the report html-formatter#281 and
• Support attaching URLs to link to other content common#2191

(These are two different wins for users, but there was enough technical overlap that it made sense to just ship them as one PR.)

🏷️ What kind of change is this?

• ⚡ New feature (non-breaking change which adds new behaviour)

📋 Checklist:

• I agree to respect and uphold the Cucumber Community Code of Conduct
• I've changed the behaviour of the code
  • I have added/updated tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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[coveralls]

coverage: 97.944% (-0.02%) from 97.961%
when pulling 5fdd358 on feat/html-externalise
into 4c67f49 on main.

[coveralls]

coverage: 97.944% (-0.02%) from 97.961%
when pulling 2db209b on feat/html-externalise
into 4c67f49 on main.

[coveralls]

coverage: 97.946% (-0.02%) from 97.961%
when pulling 9cfdb2b on feat/html-externalise
into 551efa2 on main.