feat: add language server implementation

[Solant]

No description provided.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6625cbc

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

This PR includes changesets to release 5 packages

Name	Type
@feature-sliced/steiger-plugin	Minor
@steiger/types	Minor
@steiger/pretty-reporter	Minor
steiger	Minor
@steiger/integration-tests	Patch

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[github-actions]

📊 Package size report

Package	Before	After
steiger-plugin-fsd	1638.92 KB	No change
steiger	67.57 KB	No change
toolkit	10.07 KB	No change

[illright]

wow, I am amazed at how little changes were required, great job! One comment about the API

[illright]

issue: this looks kinda weird, to be honest. I get that it is to prevent breaking changes, but we are not 1.0.0 yet, so I wouldn't worry too much about it in favor of a well-designed API for 1.0.0

suggestion: let's define start as a separate field? Or alternatively, to avoid breaking changes, make line?: number | { start: number; end: number }, and the same for column?

[Solant]

done