feat: add health checker

lua/gopher/_utils/init.lua

@@ -19,4 +19,21 @@ return {
 
     return s:sub(1, n)
   end,
+
+  ---@param lib string
+  ---@return boolean
+  lualib_is_found = function(lib)
+    local is_found, _ = pcall(require, lib)
+    return is_found
+  end,
+
+  ---@param bin string
+  ---@return boolean
+  binary_is_found = function(bin)
+    if vim.fn.executable(bin) == 1 then
+      return true
+    end
+
+    return false
+  end,
 }