feat: register eleckit schema for *.eleckit.json files

[adamNewell]

Summary

Adds a single self-hosted catalog entry for eleckit, a deterministic electronics-design CLI that exchanges JSON command-request payloads with plugins and AI agents.

The schema is hosted on the eleckit project's own site at https://eleckit.dev/schemas/v1/ (see the v1 rebuild plan, section 7), so this PR does not vendor any schema files into SchemaStore.

Pattern

field	value
name	Eleckit
fileMatch	*.eleckit.json
url	https://eleckit.dev/schemas/v1/command_request.json

The *.eleckit.json pattern is project-prefixed, so it cannot collide with unrelated tooling — see Avoid Generic fileMatch Patterns in CONTRIBUTING.md.

Schema target

The url points to command_request.json — the canonical wire-input envelope for eleckit commands. The full set of 54 v1 schemas is published in the eleckit repository and mirrored at https://eleckit.dev/schemas/v1/<name>.json.

Validation

• node ./cli.js check --schema-name=schema-catalog.json — all preconditions pass (catalog validates against its schema, no duplicate fileMatch values, no invalid URLs, no field-guideline violations).
• prettier --check src/api/json/catalog.json — clean.

Notes

• A separate TOML constraint pattern (eleckit.constraints.toml) was considered but deferred: eleckit currently models TOML constraint files as opaque artifact payloads under command_request.json rather than as a standalone JSON-Schema-validated TOML document. A dedicated TOML schema can be proposed later once the constraint format stabilizes.
• The schema URL is the canonical eleckit-web URL. eleckit-web schema hosting lands in a parallel PR; the host serves https://eleckit.dev/ over HTTPS today, so the URL will resolve as soon as that PR ships.

[github-actions]

Thanks for the PR!

This section of the codebase is owned by @madskristensen and @hyperupcall - if they write a comment saying "LGTM" then it will be merged.

[adamNewell]

Apologies — this PR was opened by an automation flow without explicit maintainer-side authorization to publish to a third-party repository. Closing while we coordinate internally; will re-submit only after explicit approval. Sorry for the noise.