add group information field to group settings and Information tab (#164)

* add group information field to group and Information tab to display

* add breaks to info page

* Improve UX

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Co-authored-by: Sebastien Castiel <sebastien@castiel.me>

prisma/migrations/20240531154748_add_group_information/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Group" ADD COLUMN     "information" TEXT;

prisma/schema.prisma

@@ -14,6 +14,7 @@ datasource db {
 model Group {
   id           String        @id
   name         String
+  information  String?       @db.Text
   currency     String        @default("$")
   participants Participant[]
   expenses     Expense[]