Invite members (#161)

* Allow user invitations

* Restyle inviting members

* Remove annoying comment

* Add page for accepting an invitation

* Send invitation email with Brevo

* Prevent admins from removing personal project users

* Mark access ceontrol for cancelProjectInvitation

* Make RadioGroup controlled

* Shorten form helper text

* Use nodemailer to send emails

* Update .env.example

app/prisma/migrations/20230815234811_add_user_invitations/migration.sql

@@ -0,0 +1,25 @@
+-- CreateTable
+CREATE TABLE "UserInvitation" (
+    "id" UUID NOT NULL,
+    "projectId" UUID NOT NULL,
+    "email" TEXT NOT NULL,
+    "role" "ProjectUserRole" NOT NULL,
+    "invitationToken" TEXT NOT NULL,
+    "senderId" UUID NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "UserInvitation_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "UserInvitation_invitationToken_key" ON "UserInvitation"("invitationToken");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "UserInvitation_projectId_email_key" ON "UserInvitation"("projectId", "email");
+
+-- AddForeignKey
+ALTER TABLE "UserInvitation" ADD CONSTRAINT "UserInvitation_projectId_fkey" FOREIGN KEY ("projectId") REFERENCES "Project"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "UserInvitation" ADD CONSTRAINT "UserInvitation_senderId_fkey" FOREIGN KEY ("senderId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;