Patchfox as a minimum viable primary client

[soapdog]

This has been outlined originally in the new funding proposal of 2021: %Y2iyBckEhcWvxX6a1+9ELeP6wFYD80QNdhvR50V1C7E=.sha256

This meta task aggregates the tasks needed before Patchfox can act as a minimum viable primary client. To be considered a MVPC, Patchfox needs to cater to the basic needs of the users. It doesn't need to cover everything, but it needs to do the basics right.

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For this task to be completed, the following issues need to be closed:

• Implement support for private messages #95 - Implement private messages.
• Improve gathering support #96 - Improve gathering support.