(split) Add file01.txt in project1
(split) Add file02.txt in project1
Split 'plugin/' into commit '6bc04d4a3e8f012c636b07c24a69f88a269f444b'

git-subtree-dir: plugin
git-subtree-mainline: c365d69a0d54293e3fd6464a0ce1a1bc6bb99303
git-subtree-split: 6bc04d4a3e8f012c636b07c24a69f88a269f444b