Update react monorepo to v19 (major) (#28914)

* Update react monorepo to v19

* Import JSX explicitly for React 19 compatibility

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Update usages of refs for React 19 compatibility

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Update react imports

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Avoid legacy contexts as much as possible

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Avoid deprecated React symbols

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* Stash

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* Update usages of refs for React 19 compatibility

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Switch pillify to use a html-react-parser approach rather than DOM muddling

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate react html parsing

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate react html parsing

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate html parsing

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Memoize the EventContentBody component

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate html parsing

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

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* Simplify

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* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Discard changes to src/Linkify.tsx

* Discard changes to src/components/views/messages/TextualBody.tsx

* Discard changes to src/settings/handlers/AbstractLocalStorageSettingsHandler.ts

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Prepare for React 19 upgrade

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Remove stale comment

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

src/accessibility/RovingTabIndex.tsx

@@ -212,7 +212,7 @@ export const RovingTabIndexProvider: React.FC<IProps> = ({
     scrollIntoView,
     onKeyDown,
 }) => {
-    const [state, dispatch] = useReducer<Reducer<IState, Action>>(reducer, {
+    const [state, dispatch] = useReducer<IState, [Action]>(reducer, {
         nodes: [],
     });