fix: lsp server package deprecation

[smonfort]

The default plugin configuration still relies on the deprecated @likec4/language-server package, which now returns the following error

This package is not available as a standalone LSP server. Use `likec4 lsp` instead.

The fix:

• replaces @likec4/language-server with thelikec4 lsp command
• requires the likec4 package to be installed globally as part of the plugin build command

Summary by CodeRabbit

• Chores
  • Updated language server command initialization to align with new package structure
  • Updated installation documentation to reflect new package naming

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 9dedc4ab-1e78-41c7-9d50-cc0ee804994b

📥 Commits

Reviewing files that changed from the base of the PR and between 78bdba8 and 5acbdac.

📒 Files selected for processing (2)

• lsp/likec4.lua
• readme.md

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📝 Walkthrough

Walkthrough

The language server command invocation was updated from likec4-language-server --stdio to likec4 lsp --stdio in the Lua configuration, with corresponding package installation changes in the documentation.

Changes

Cohort / File(s)	Summary
Language Server Configuration lsp/likec4.lua	Updated command from likec4-language-server executable with --stdio to likec4 with lsp --stdio arguments.
Installation Instructions readme.md	Updated lazy.nvim build command from installing @likec4/language-server package globally to likec4. Removed extra blank line in documentation.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

A rabbit hops through configs so fine,
Commands renamed, now they align,
From likec4-language-server tall,
To likec4 lsp—simpler for all! 🐰✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: updating the LSP server package from a deprecated @likec4/language-server to the likec4 CLI command.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

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📝 Coding Plan

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