Lucas/t 231 timebox i can create a company at the same time im creating (#140)

This PR is a bit messy:

adding graphql schema
adding create company creation on company select on People page
some frontend refactoring to be continued

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Co-authored-by: Charles Bochet <charles@twenty.com>

server/src/api/graphql/resolvers/crud/Person/FindFirstPersonOrThrowResolver.ts

@@ -0,0 +1,19 @@
+import * as TypeGraphQL from "type-graphql";
+import type { GraphQLResolveInfo } from "graphql";
+import { FindFirstPersonOrThrowArgs } from "./args/FindFirstPersonOrThrowArgs";
+import { Person } from "../../../models/Person";
+import { transformInfoIntoPrismaArgs, getPrismaFromContext, transformCountFieldIntoSelectRelationsCount } from "../../../helpers";
+
+@TypeGraphQL.Resolver(_of => Person)
+export class FindFirstPersonOrThrowResolver {
+  @TypeGraphQL.Query(_returns => Person, {
+    nullable: true
+  })
+  async findFirstPersonOrThrow(@TypeGraphQL.Ctx() ctx: any, @TypeGraphQL.Info() info: GraphQLResolveInfo, @TypeGraphQL.Args() args: FindFirstPersonOrThrowArgs): Promise<Person | null> {
+    const { _count } = transformInfoIntoPrismaArgs(info);
+    return getPrismaFromContext(ctx).person.findFirstOrThrow({
+      ...args,
+      ...(_count && transformCountFieldIntoSelectRelationsCount(_count)),
+    });
+  }
+}