ci: fix windows jobs by restoring vlib/readline/readline_windows.c.v

vlib/readline/readline_windows.c.v

@@ -0,0 +1,60 @@
+// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+// Windows version
+// Need to be implemented
+// Will serve as more advanced input method
+// Based on the work of https://github.com/AmokHuginnsson/replxx
+
+module readline
+
+import os
+
+// Only use standard os.get_line
+// Need implementation for readline capabilities
+pub fn (mut r Readline) read_line_utf8(prompt string) ?ustring {
+  r.current = ''.ustring()
+  r.cursor = 0
+  r.prompt = prompt
+  r.search_index = 0
+  if r.previous_lines.len <= 1 {
+    r.previous_lines << ''.ustring()
+    r.previous_lines << ''.ustring()
+  }
+  else {
+    r.previous_lines[0] = ''.ustring()
+  }
+
+  print(r.prompt)
+  r.current = os.get_raw_line().ustring()
+
+  r.previous_lines[0] = ''.ustring()
+  r.search_index = 0
+  if r.current.s == '' {
+    return error('empty line')
+  }
+  return r.current
+}
+
+// Returns the string from the utf8 ustring
+pub fn (mut r Readline) read_line(prompt string) ?string {
+  s := r.read_line_utf8(prompt)?
+  return s.s
+}
+
+// Standalone function without persistent functionnalities (eg: history)
+// Returns utf8 based ustring
+pub fn read_line_utf8(prompt string) ?ustring {
+  mut r := Readline{}
+  s := r.read_line_utf8(prompt)?
+  return s
+}
+
+// Standalone function without persistent functionnalities (eg: history)
+// Return string from utf8 ustring
+pub fn read_line(prompt string) ?string {
+  mut r := Readline{}
+  s := r.read_line(prompt)?
+  return s
+}