Fix: enable Node.js experimental SQLite for copilot-language-server (Fixes #603)

[guimochila]

Fixes #603. This PR passes the Node.js flag --experimental-sqlite when launching copilot-language-server, resolving startup/runtime failures where the SQLite API is gated behind an experimental flag (Node.js 22+). This is a temporary workaround and can be removed once a stable upstream fix is available.

[AntoineGS]

This unfortunately breaks the plugin when using the pre-built binaries, we would need to ensure this only kicks in when config.server.type = "nodejs"
Since the new logic is duplicated it would be best to centralize it as well :P
Thanks for your work!

[guimochila]

Hey @AntoineGS, I will improve the code add the check to make sure that only apply the change when config.server.type = "nodejs". Thanks for the feedback.

[guimochila]

@AntoineGS I have moved the arguments build function to utils and returning only the args table when using the binary version.

[guimochila]

@AntoineGS I have updated the tests. I forgot to add the new flag to tests. 🤦

[AntoineGS]

Hey I see you also made tweaks to the tests, I took a different approach though to ensure we test the new functionality so I overwrote your changes (sorry!)

[guimochila]

No problem, I really enjoyed your approach. 👏