🐛 Fix crash in token grid view due to tooltip validation (#7887)

The color tokens in grid view have a tooltip which is a map.
This is done so the frontend can render:

```
Name: foo
Resolved value: #000000
```

However the validation scheme for tooltips was only accepting functions
and strings.

---

How to reproduce the original (unreported) crash:
* Create a color token
* Create a shape, add a fill
* Pick a color, chose the Token options
* Click on the Grid View

Crash: `{:hint "invalid props on component tooltip*\n\n  -> 'content'
    should be a string\n"}`

Signed-off-by: Dalai Felinto <dalai@blender.org>
Co-authored-by: Dalai Felinto <dalai@blender.org>

CHANGES.md

@@ -61,6 +61,7 @@ example. It's still usable as before, we just removed the example.
 ### :heart: Community contributions (Thank you!)
 
 - Ensure consistent snap behavior across all zoom levels [Github #7774](https://github.com/penpot/penpot/pull/7774) by [@Tokytome](https://github.com/Tokytome)
+- Fix crash in token grid view due to tooltip validation (by @dfelinto) [Github #7887](https://github.com/penpot/penpot/pull/7887)
 
 ### :sparkles: New features & Enhancements
 

frontend/src/app/main/ui/ds/tooltip/tooltip.cljs

@@ -173,7 +173,7 @@
    [:id {:optional true} :string]
    [:offset {:optional true} :int]
    [:delay {:optional true} :int]
-   [:content [:or fn? :string]]
+   [:content [:or fn? :string map?]]
    [:placement {:optional true}
     [:maybe [:enum "top" "bottom" "left" "right" "top-right" "bottom-right" "bottom-left" "top-left"]]]])