* [refactor] Refactor project using React.

fix #18.

Signed-off-by: LinHaiming <lhming23@outlook.com>

* feature: add welcome component

Signed-off-by: LinHaiming <lhming23@outlook.com>

* chore: add eslint, prettier and husky

Signed-off-by: LinHaiming <lhming23@outlook.com>

* chore: update .gitignore

Signed-off-by: LinHaiming <lhming23@outlook.com>

* fix: update manifest.json

Signed-off-by: LinHaiming <lhming23@outlook.com>

* test: add unit test for utils

Signed-off-by: LinHaiming <lhming23@outlook.com>

* test: add snapshot test for welcome component

Signed-off-by: LinHaiming <lhming23@outlook.com>

* doc: add contribuiting guide

Signed-off-by: LinHaiming <lhming23@outlook.com>

* test: change test files naming conventions

Signed-off-by: LinHaiming <lhming23@outlook.com>