Expose entireWord in updateFindControlState

Allow apps with supportsIntegratedFind to better monitor the find state.

A recognized use case is the Firefox findbar, its "not found" sound must
consider `entireWord` and only make noise when it is off.

See related implementation in
https://hg.mozilla.org/mozilla-central/rev/16b902cbcf26

This change can help if we have to move the implementation from cpp to jsm.

web/app.js

@@ -2516,6 +2516,7 @@ function webViewerUpdateFindMatchesCount({ matchesCount }) {
 function webViewerUpdateFindControlState({
   state,
   previous,
+  entireWord,
   matchesCount,
   rawQuery,
 }) {
@@ -2523,6 +2524,7 @@ function webViewerUpdateFindControlState({
     PDFViewerApplication.externalServices.updateFindControlState({
       result: state,
       findPrevious: previous,
+      entireWord,
       matchesCount,
       rawQuery,
     });

web/pdf_find_controller.js

@@ -1133,6 +1133,7 @@ class PDFFindController {
       source: this,
       state,
       previous,
+      entireWord: this.#state?.entireWord ?? null,
       matchesCount: this.#requestMatchesCount(),
       rawQuery: this.#state?.query ?? null,
     });