fix(oxlint/lsp): don't register textDocument/formatting capability

[Sysix]

Refactored the language server, so the ServerCapability can modified by each tool.
Before, we just registered the textDocument/formatting capability, if the client supports it dynamically.

Now we tell the client at the beginning if the request is supported, skipping the dynamic registration. Improving integration with client that does only support static registration.

And only of course when we use the formatter tool ;) Skipping it for oxlint --lsp

[Sysix]

• fix(oxlint/lsp): don't register textDocument/formatting capability #15882 👈 (View in Graphite)
• main

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[Copilot]

Pull Request Overview

This PR refactors the language server to allow tools (linter, formatter) to directly modify server capabilities during initialization, replacing the previous approach of dynamic capability registration. The main goal is to improve compatibility with LSP clients that only support static capability registration.

Key Changes:

• Modified the ToolBuilder trait to expose a server_capabilities method that allows tools to declare their capabilities upfront
• Removed dynamic registration of textDocument/formatting capability in favor of static declaration
• Each tool now independently adds its capabilities (linter adds code actions/commands, formatter adds document formatting)

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
crates/oxc_language_server/src/tool.rs	Replaced provided_commands and provided_code_action_kinds methods with a unified server_capabilities method for modifying capabilities directly
crates/oxc_language_server/src/linter/server_linter.rs	Implemented server_capabilities to add code action kinds and execute commands, with comprehensive test coverage for various capability scenarios
crates/oxc_language_server/src/formatter/server_formatter.rs	Implemented server_capabilities to enable document formatting provider, with basic test coverage
crates/oxc_language_server/src/capabilities.rs	Simplified by removing client capability checks for code actions and commands, converting server_capabilities to a standalone function
crates/oxc_language_server/src/backend.rs	Updated initialization to call server_capabilities on each tool builder and removed dynamic formatting registration logic

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