feat(lsp): add LSP tools integration with workspace/configuration support

- Add 7 LSP tools: hover, goto_definition, find_references, document_symbols, workspace_symbols, diagnostics, servers
- Support multiple LSP servers: typescript, gopls, pyrefly, basedpyright, ruff, rust-analyzer, clangd, sourcekit-lsp, ruby-lsp
- Read LSP config from opencode.json with disabled server support
- Handle server requests: workspace/configuration, client/registerCapability, window/workDoneProgress/create
- Send workspace/didChangeConfiguration after initialized for basedpyright compatibility
- Uint8Array-based buffer for reliable LSP message parsing

src/tools/index.ts

@@ -0,0 +1,19 @@
+import {
+  lsp_hover,
+  lsp_goto_definition,
+  lsp_find_references,
+  lsp_document_symbols,
+  lsp_workspace_symbols,
+  lsp_diagnostics,
+  lsp_servers,
+} from "./lsp"
+
+export const builtinTools = {
+  lsp_hover,
+  lsp_goto_definition,
+  lsp_find_references,
+  lsp_document_symbols,
+  lsp_workspace_symbols,
+  lsp_diagnostics,
+  lsp_servers,
+}