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/hooks/api/index.ts

@@ -8,3 +8,4 @@ export { default as useRemoveAnnouncement } from './useRemoveAnnouncement'
 export { default as useSignIn } from './useSignIn'
 export { default as useSignUp } from './useSignUp'
 export { default as usePoetry } from './usePoetry'
+export { default as useDispose } from './useDispose'