Initital Hono grafserv adapter

[olup]

Description

This PR adds a initial Hono adapter to grafserv. I won't handle bufferStream or websockets yet.

Performance impact

n/a

Security impact

unknown

Checklist

• My code matches the project's code style and yarn lint:fix passes.
• I've added tests for the new feature, and yarn test passes.
• I have detailed the new feature in the relevant documentation.
• [?] I have added this feature to 'Pending' in the RELEASE_NOTES.md file (if one exists).
• If this is a breaking change I've explained why.

[changeset-bot]

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Latest commit: bf2a347

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[benjie]

Happy to see work being done on this! Suggest that you find other people using hono to validate the approach - feel free to ask around in #watercooler on the Discord.