refactor: rewrite installation using jobs and async

Replace sync variants with callback support

lua/nvim-treesitter/util.lua

@@ -0,0 +1,28 @@
+local uv = vim.loop
+
+local M = {}
+
+--- @param filename string
+--- @return string
+function M.read_file(filename)
+  local file = assert(io.open(filename, 'r'))
+  local r = file:read('*a')
+  file:close()
+  return r
+end
+
+--- @param filename string
+--- @param content string
+function M.write_file(filename, content)
+  local file = assert(io.open(filename, 'w'))
+  file:write(content)
+  file:close()
+end
+
+--- Recursively delete a directory
+--- @param name string
+function M.delete(name)
+  vim.fs.rm(name, { recursive = true, force = true })
+end
+
+return M