feat(API): Add route for schema static files

[elsmr]

Summary

• Create new endpoint to fetch schema files for a given node
• Rename copy-icons to copy-static-files and include new schema files
• Include an example schema file for testing (from https://github.com/n8n-io/n8n/tree/schema-generation-17842463)

How to test:

• http://localhost:5678/schemas/n8n-nodes-base.activeCampaign/1.0.0/account/get.json should return the correct schema
• Other nodes, resources or operations should return 404

Frontend will be added in a next PR

Related Linear tickets, Github issues, and Community forum posts

https://linear.app/n8n/issue/NODE-2216/load-the-schema-dynamically

Review / Merge checklist

• PR title and summary are descriptive. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.
• PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)

[codecov]

Codecov Report

Attention: Patch coverage is 41.17647% with 10 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
packages/cli/src/server.ts	0.00%	9 Missing ⚠️
packages/cli/src/load-nodes-and-credentials.ts	87.50%	0 Missing and 1 partial ⚠️

📢 Thoughts on this report? Let us know!

[netroy]

are we planning to auto-generate these schema files? if not, how do we keep these updated in the long run?