[Feature Request] - Show Full PR Details

### Feature summary

The PR Canvas should show more details about the PR.

### What problem are you trying to solve?

The PR canvas currently only shows comments and status. I would like if I could see everything that you can see on the Web UI, including adding, deleting, or updating:

- commit history
- reviewers
- assignees
- labels
- milestones
- projects
- etc

### Proposed solution

Mimic the Web UI’s displayed information for PRs.

### Workflow impact

Users will be able to see more about their PRs, and take more actions from inside the app.

### Installation context

Installed v0.2.24 on Arch Linux

### Additional context

I am happy to help / contribute if you allow that, just let me know / assign me an issue. I’d love to help.

Inizia individuando il PR Canvas e verificando come visualizza attualmente i commenti e lo stato. Confronta questo ambito con i dettagli e le azioni della Web UI elencati nell’issue; il lavoro sarebbe completato quando esistesse un sottoinsieme definito e implementato di questi dettagli e azioni del PR, con i relativi confini concordati.

Scritto dal modello di indicizzazione a partire dal testo della issue.