✨(react) add min-width to Field

Without this new property the components using Field ( Input, Select, ... )
would not properly fit by default inside a flex parent.

.changeset/swift-snakes-rescue.md

@@ -0,0 +1,5 @@
+---
+"@openfun/cunningham-react": patch
+---
+
+add min-width to Field

packages/react/src/components/Forms/Field/index.scss

@@ -4,6 +4,7 @@
   width: var(--c--components--forms-field--width);
   color: var(--c--components--forms-field--color);
   box-sizing: border-box;
+  min-width: 0;
 
   &__footer {
     font-size: var(--c--components--forms-field--font-size);