React 18 (#863)

* gymnastics to make theme script work with react 18 hydration

* try next 12.1.3 canary to fix SSG head tags?

* revert theme script changes

* next 12.1.3-canary.3

* double-revert some of the use-theme.tsx changes

* separate theme restoration script & move to _document

* bump next

* bump next (again)

* clean up some theme stuff

* use hashed image URLs in webmanifest and feeds

* text experimental react config

* Update ThemeScript.tsx

* switch selfie image to `layout="raw"`

* use `layout="raw"` for all non-imported images

* revert raw images in some places, messes up responsiveness

* fix nitpicky "no divs inside buttons" html validation error

* fix react-player hydration errors

* fix hydration errors from server/client time zone differences

* clean up hydration fixes

* Update format-date.ts

* last-minute cleanup

components/NotesList/NotesList.tsx

@@ -1,5 +1,5 @@
-import { format } from "date-fns";
 import Link from "../Link";
+import { formatDateTZ } from "../../lib/helpers/format-date";
 import { styled } from "../../lib/styles/stitches.config";
 import type { NoteType } from "../../types";
 
@@ -67,7 +67,7 @@ const NotesList = ({ notesByYear }: NotesListProps) => {
         <List>
           {notes.map(({ slug, date, htmlTitle }) => (
             <Post key={slug}>
-              <PostDate>{format(new Date(date), "MMM d")}</PostDate>
+              <PostDate title={formatDateTZ(date)}>{formatDateTZ(date, "MMM d")}</PostDate>
               <span>
                 <Link
                   href={{