feat(health): add check-health

lua/lualine-harpoon/health.lua

@@ -0,0 +1,28 @@
+local M = {}
+
+function M.check()
+	vim.health.start("lualine-harpoon")
+
+	local has_lualine = pcall(require, "lualine")
+	if has_lualine then
+		vim.health.ok("lualine is installed")
+	else
+		vim.health.error("lualine is not installed")
+	end
+
+	local has_harpoon = pcall(require, "harpoon")
+	if has_harpoon then
+		vim.health.ok("harpoon is installed")
+	else
+		vim.health.warn("harpoon is not installed - component will show empty")
+	end
+
+	local has_plenary = pcall(require, "plenary.path")
+	if has_plenary then
+		vim.health.ok("plenary.nvim is installed (recommended)")
+	else
+		vim.health.warn("plenary.nvim is not installed - path normalization disabled")
+	end
+end
+
+return M