refactor(parser): Move utility functions to table utils

lua/symbols-outline/utils/table.lua

@@ -0,0 +1,31 @@
+local M = {}
+
+function M.table_to_str(t)
+  local ret = ''
+  for _, value in ipairs(t) do
+    ret = ret .. tostring(value)
+  end
+  return ret
+end
+
+function M.str_to_table(str)
+  local t = {}
+  for i = 1, #str do
+    t[i] = str:sub(i, i)
+  end
+  return t
+end
+
+--- Copies an array and returns it because lua usually does references
+---@generic T
+---@param t T[]
+---@return T[]
+function M.array_copy(t)
+  local ret = {}
+  for _, value in ipairs(t) do
+    table.insert(ret, value)
+  end
+  return ret
+end
+
+return M