fix(denols): prevent detecting non-deno TypeScript projects

[AsPulse]

Problem

Currently, non-Deno TypeScript LSPs (ts_ls, tsgo, vtsls) have mechanisms to prevent conflicts by not activating on_dir when a Deno project is detected.

nvim-lspconfig/lsp/ts_ls.lua

Lines 56 to 73 in e0fae25

	root_dir = function(bufnr, on_dir)
	-- The project root is where the LSP can be started from
	-- As stated in the documentation above, this LSP supports monorepos and simple projects.
	-- We select then from the project root, which is identified by the presence of a package
	-- manager lock file.
	local root_markers = { 'package-lock.json', 'yarn.lock', 'pnpm-lock.yaml', 'bun.lockb', 'bun.lock' }
	-- Give the root markers equal priority by wrapping them in a table
	root_markers = vim.fn.has('nvim-0.11.3') == 1 and { root_markers, { '.git' } }
	or vim.list_extend(root_markers, { '.git' })
	-- exclude deno
	local deno_path = vim.fs.root(bufnr, { 'deno.json', 'deno.jsonc', 'deno.lock' })
	local project_root = vim.fs.root(bufnr, root_markers)
	if deno_path and (not project_root or #deno_path >= #project_root) then
	return
	end
	-- We fallback to the current working directory if no project root is found
	on_dir(project_root or vim.fn.getcwd())
	end,

However, denols lacks such a mechanism. As a result, when a non-Deno project is opened with denols enabled, both LSPs become attached.

Solution

We will add conflict prevention logic to denols, similar to what non-Deno TypeScript LSPs have.
Currently, Deno has a workspace feature, so we will detect the workspace root using deno.lock in the same way non-Deno TypeScript LSPs do. If deno.lock is not present and only deno.json(c) exists, we will handle it with a fallback.

Testing

I confirmed that the expected LSP launched with the expected root_dir in the following situations:

• Deno monorepo project
• A single Deno project with a deno.lock file in the root
• A single Deno project without a deno.lock file in the root
• npm monorepo project
• A single npm project with a package-lock.json file in the root
• A single npm project without a package-lock.json (or any other non-Deno lock file) in the root