Parcel SDK Implenmentations

[HarleyAppleChoi]

Description

Users will send the metadata about their actions on blogposts to Parcel. The users can view their own statistics and doing a little "personality test" base on their statistics.

Mooncake gets a registered client code from the Steward app in-process and saves it to the local device.

• 1. Mooncake should redirect to the steward app and ask the user for permission to collect metadata, then retrieve back the access token and store it internally on the device.

• 2.When a transaction occurs, the message is sent to the steward using the user's access.

Checklist

• Targeted PR against correct branch.
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Wrote unit tests.
• Run flutter format.
• Updated the documentation.
• Added an entry to the CHANGELOG.md file.
• Re-reviewed Files changed in the Github PR explorer.