Added cwd input option (#134)

* feat: add cwd for projects that not in the root directory

* docs: add cwd to README

* reword the added log

* tweak changeset

Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>

action.yml

@@ -10,6 +10,9 @@ inputs:
   version:
     description: "The command to update version, edit CHANGELOG, read and delete changesets. Default to `changeset version` if not provided"
     required: false
+  cwd:
+    description: Sets the cwd for the node process. Default to `process.cwd()`
+    required: false
   commit:
     description: |
       The commit message. Default to `Version Packages`