[FR] Create a v0.1 plugin marketplace for users to browse

### Description

- [ ] an entry `Plugins` in the left navigation panel of the application, right above the Trash icon
- [ ] click on the `Plugins`, the user should be able to browse a list of AppFlowy plugins in a popup large size window.
- [ ] each plugin item is displayed in a card component
- [ ] each plugin should show metadata: name, by {GitHub profile}, the last update time, a one-liner description
- [ ] after clicking on a plugin card, the user should be able to see the plugin's guidebook, including its description, how-tos, etc
- [ ] encourage each plugin developer to set up a buy me a coffee account and link it to their plugin page
- [ ] add details to each plugin page

### Impact

All the users

### Additional Context

_No response_