move src/images into src/app/images

I'm gonna add a `src/shared` next, and it felt weird for `images` to be a sibling, esp since the images are only for the client app!

src/app/GlobalHeader.js

@@ -16,8 +16,8 @@ import { ChevronLeftIcon } from "@chakra-ui/icons";
 
 import useCurrentUser from "./components/useCurrentUser";
 
-import HomeLinkIcon from "../images/home-link-icon.png";
-import HomeLinkIcon2x from "../images/home-link-icon@2x.png";
+import HomeLinkIcon from "./images/home-link-icon.png";
+import HomeLinkIcon2x from "./images/home-link-icon@2x.png";
 
 function GlobalHeader() {
   return (

src/app/HomePage.js

@@ -19,10 +19,10 @@ import { Heading1, useLocalStorage, usePageTitle } from "./util";
 import OutfitPreview from "./components/OutfitPreview";
 import SpeciesColorPicker from "./components/SpeciesColorPicker";
 
-import HomepageSplashImg from "../images/homepage-splash.png";
-import HomepageSplashImg2x from "../images/homepage-splash@2x.png";
-import FeedbackXweeImg from "../images/feedback-xwee.png";
-import FeedbackXweeImg2x from "../images/feedback-xwee@2x.png";
+import HomepageSplashImg from "./images/homepage-splash.png";
+import HomepageSplashImg2x from "./images/homepage-splash@2x.png";
+import FeedbackXweeImg from "./images/feedback-xwee.png";
+import FeedbackXweeImg2x from "./images/feedback-xwee@2x.png";
 
 function HomePage() {
   usePageTitle(null);

src/app/WardrobePage/PosePicker.js

@@ -27,13 +27,13 @@ import useSupport from "./support/useSupport";
 import { useLocalStorage } from "../util";
 
 // From https://twemoji.twitter.com/, thank you!
-import twemojiSmile from "../../images/twemoji/smile.svg";
-import twemojiCry from "../../images/twemoji/cry.svg";
-import twemojiSick from "../../images/twemoji/sick.svg";
-import twemojiSunglasses from "../../images/twemoji/sunglasses.svg";
-import twemojiQuestion from "../../images/twemoji/question.svg";
-import twemojiMasc from "../../images/twemoji/masc.svg";
-import twemojiFem from "../../images/twemoji/fem.svg";
+import twemojiSmile from "../images/twemoji/smile.svg";
+import twemojiCry from "../images/twemoji/cry.svg";
+import twemojiSick from "../images/twemoji/sick.svg";
+import twemojiSunglasses from "../images/twemoji/sunglasses.svg";
+import twemojiQuestion from "../images/twemoji/question.svg";
+import twemojiMasc from "../images/twemoji/masc.svg";
+import twemojiFem from "../images/twemoji/fem.svg";
 
 const PosePickerSupport = loadable(() => import("./support/PosePickerSupport"));
 

src/app/components/WIPCallout.js

@@ -1,8 +1,8 @@
 import React from "react";
 import { Box, Flex, Tooltip } from "@chakra-ui/react";
 
-import WIPXweeImg from "../../images/wip-xwee.png";
-import WIPXweeImg2x from "../../images/wip-xwee@2x.png";
+import WIPXweeImg from "../images/wip-xwee.png";
+import WIPXweeImg2x from "../images/wip-xwee@2x.png";
 
 function WIPCallout({ children, details }) {
   let content = (