[CORL 547] org-wide announcements (#2813)

* CRUD announcements

* only show announcement if not disabled

* make announcements dismissable

* add announcement mutations

* update announcement form logic

* style announcements on stream

* update snap

* localize strings

* close form if announcement is removed

* move announcement config below sitewide commenting config

* move date calculation inside useMemo

* move announcementconfig code to announcementconfigcontainer

* use coralContext for localStorage

* fix type of announcement createdAt

* move announcement form to modal

* remove payload pruning from configure route

* simplify announcement display logic

* make validation message full width

Co-authored-by: Kim Gardner <kgardnr@gmail.com>

src/core/client/admin/test/configure/__snapshots__/general.spec.tsx.snap

@@ -359,6 +359,50 @@ reactions, be reported, and be shared.
               </fieldset>
             </div>
           </fieldset>
+          <fieldset
+            className="FieldSet-root Box-root ConfigBox-root"
+          >
+            <div
+              className="Box-root Flex-root ConfigBox-title Flex-flex Flex-justifySpaceBetween"
+            >
+              <div>
+                <legend
+                  className="Header-root"
+                >
+                  Community announcement
+                </legend>
+              </div>
+              <div />
+            </div>
+            <div
+              className="ConfigBox-content"
+            >
+              <fieldset
+                className="FieldSet-root Box-root HorizontalGutter-root HorizontalGutter-spacing-4"
+              >
+                <p
+                  className="FormFieldDescription-root"
+                >
+                  Add a temporary announcement that will appear at the top of all of your organization’s comment streams for a specific amount of time.
+                </p>
+                <button
+                  className="BaseButton-root Button-root Button-sizeRegular Button-colorRegular Button-variantRegular Button-uppercase"
+                  data-color="regular"
+                  data-variant="regular"
+                  disabled={false}
+                  onBlur={[Function]}
+                  onClick={[Function]}
+                  onFocus={[Function]}
+                  onMouseOut={[Function]}
+                  onMouseOver={[Function]}
+                  onTouchEnd={[Function]}
+                  type="button"
+                >
+                  Add announcement
+                </button>
+              </fieldset>
+            </div>
+          </fieldset>
           <fieldset
             className="FieldSet-root Box-root ConfigBox-root"
           >