Implement auto-completion/intellisense for sing-box profile editing in LSP

[Copilot]

• Implement auto-completion/intellisense for sing-box profile editing in LSP
• Refactor to only provide reference completions (tags), delegate static enum completions to VSCode JSON LSP with sing-box schema (https://github.com/BlackDuty/sing-box-schema)

What this LSP now provides:

Reference completions (tags):

• DNS server tags (dns.final, dns.servers[].address_resolver, dns.rules[].server)
• Outbound tags (route.final, route.rules[].outbound, outbounds[].default, outbounds[].outbounds[], route.rule_set[].download_detour, dns.servers[].detour)
• Inbound tags (route.rules[].inbound[])
• Rule set tags (route.rules[].rule_set[])

What VSCode JSON LSP handles (via sing-box schema):

• Static key completions
• Enum value completions (type, log.level, dns.strategy, method, etc.)

Future:

• Generation completions (UUID, public_key, etc.) can be added to this LSP

Original prompt

Following #file:singbox-config-internal-relations.md , implement auto-completion / intellisense in packages/lsp for editing sing-box profile.

The user has attached the following file paths as relevant context:

• docs\singbox-config-internal-relations.md

Created from VS Code via the GitHub Pull Request extension.

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[xiaoland]

@copilot For key completion or static value completion, provide SingBox JSON schema (https://github.com/BlackDuty/sing-box-schema) to VSCode Json LSP. only completions like reference completion (eg. tag, outbound, server) or generation completion (eg. public_key, uuid, etc.) will requires our customize lsp.

[Copilot]

@copilot For key completion or static value completion, provide SingBox JSON schema (https://github.com/BlackDuty/sing-box-schema) to VSCode Json LSP. only completions like reference completion (eg. t...

Refactored in 489f811. The LSP now only provides reference completions (tags for inbound, outbound, DNS server, rule sets). Static enum completions (type, log level, DNS strategy, etc.) are delegated to VSCode's JSON LSP with the sing-box schema.