Fix typo in README and move conflict management to long term goals

Dependencies

• [2] 2OX32U3O Add conflict management to MVP features
• [3] SDZNGGDN Update README to add changelog and channel views as features
• [4] NCBEWRYE Initialize Repository
• [5] BOS2K4SQ Add signing changes feature to README
• [6] NL47PGQC Update README

Change contents

• replacement in README.md at line 58
  [3.2134]→[3.2134:2160](∅→∅)
  − - Ignore file mangagement
  [3.2134]

  [3.391]
  + - Ignore file management
• edit in README.md at line 60
  [3.409]→[2.0:22](∅→∅)
  − - Conflict management
• edit in README.md at line 66
  [3.2530]

  [3.112862]
  + - Conflict management