Added announcement disposal:

Added ann details button
Added modal shown on its click
Moved trashbox selection there
Added trashboxes mock while testing in restricted area

front/src/api/dispose/index.ts

@@ -0,0 +1,19 @@
+import { API_URL } from '../../config'
+import { TrashboxDispose, DisposeResponse } from './types'
+
+const composeDisposeURL = () => (
+    API_URL + '/announcement/dispose?'
+)
+
+const composeDisposeBody = (ann_id: number, trashbox: TrashboxDispose) => (
+    JSON.stringify({
+        ann_id,
+        trashbox,
+    })
+)
+
+const processDispose = (data: DisposeResponse): boolean => {
+    return data.Success
+}
+
+export { composeDisposeURL, composeDisposeBody, processDispose }