feat(neovim): improve rust-analyzer lsp config

It did not pick up `Cargo.toml` in subdirectories before.

home/editors/neovim/lsp/lsp.lua

@@ -57,7 +57,6 @@ local servers = {
   "pylsp",
   "terraformls",
   "hls",
-  "rust_analyzer",
   "vimls",
   "glslls",
 }
@@ -68,6 +67,11 @@ for _, lsp in ipairs(servers) do
   }
 end
 
+config.rust_analyzer.setup{
+  capabilities = capabilities,
+  root_dir = config.util.root_pattern("Cargo.toml", "rust-project.json", ".git"),
+}
+
 config.omnisharp.setup{
   capabilities = capabilities,
   cmd = {"omnisharp", "--languageserver", "--hostPID", tostring(pid)},