(split) Add plugin
(split) Update 1 for plugin
Split 'plugin/' into commit 'cc16e9a3d311e3ad1d3165e4d55d3ffbc53af121'

git-subtree-dir: plugin
git-subtree-mainline: 38fe0f047d2acda3759511b4bc874bfdce0ff75f
git-subtree-split: cc16e9a3d311e3ad1d3165e4d55d3ffbc53af121
Add .gitignore
Merge commit 'f2d7700362c31dbbf81a9daf97ff54a5db1cd488'