Add copy button next to base ref name in PR header information

What the title says

Auteur
HappyViking
Installations quotidiennes
0
Installations (total)
2
Notes
0 0 0
Version
1
Créé
29/09/2023
Mis à jour
29/09/2023
Licence
MIT
S'applique à

(Used with the Refined Github browser extension)

Before:

After: