feat: prepare jitsi invite popup card

src/components/Button.jsx

src/components/Navbar.jsx

src/components/annoucements/Announcement.jsx

src/components/annoucements/AnnouncementEditModal.jsx

src/components/annoucements/AnnouncementList.jsx

src/components/modals/ModalConfirm.jsx

src/components/posts/PostEditModal.jsx

src/components/posts/PostList.jsx

src/components/program/ProgramEntryEditModal.jsx

src/containers/AddAnnouncementForm.jsx

src/containers/JitsiInviteCard.jsx

src/containers/PostsContainer.jsx

src/pages/Home.jsx

src/stores.js

typings/cf2021.d.ts