feat(cli): add basic .ec import command (DSL -> frontmatter)

[thorthelegend99]

Summary

• adds a basic eventcatalog import <file.ec> command
• parses simple DSL blocks for event, command, query, service, and domain
• writes resources using existing SDK write functions (frontmatter files)
• supports --dry-run to preview imports without writing
• adds a basic test with a simple example (event + service sends)

Example

eventcatalog import ./catalog.ec --dir .

Notes

This is intentionally v1/basic and currently supports a narrow subset of DSL lines:

• version, name, summary
• sends <type> <id[@version]>
• receives <type> <id[@version]>
• service <id[@version]> inside domain blocks

Validation

• pnpm --filter @eventcatalog/cli exec vitest --run src/test/cli-import.test.ts

[changeset-bot]

🦋 Changeset detected

Latest commit: 97c6f06

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@eventcatalog/cli	Minor

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[CLAassistant]

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