Feature/change fees interest and search to general availability (#2525)

* Change features to general availability

* Fees on account level
* Interest on account level
* Search for a holding

* Update changelog

* Add documentation for experimental features

apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.html

@@ -21,10 +21,7 @@
               >Stocks, ETFs, bonds, cryptocurrencies, commodities</small
             >
           </mat-option>
-          <mat-option
-            *ngIf="data.user?.settings?.isExperimentalFeatures"
-            value="FEE"
-          >
+          <mat-option value="FEE">
             <span><b>{{ typesTranslationMap['FEE'] }}</b></span>
             <small class="d-block line-height-1 text-muted text-nowrap" i18n
               >One-time fee, annual account fees</small
@@ -36,10 +33,7 @@
               >Distribution of corporate earnings</small
             >
           </mat-option>
-          <mat-option
-            *ngIf="data.user?.settings?.isExperimentalFeatures"
-            value="INTEREST"
-          >
+          <mat-option value="INTEREST">
             <span><b>{{ typesTranslationMap['INTEREST'] }}</b></span>
             <small class="d-block line-height-1 text-muted text-nowrap" i18n
               >Revenue for lending out money</small