chore(ui): collapsable cell

...le-structure/personal-offer/personal-offer.component.html

...le-structure/personal-offer/personal-offer.component.scss

...file-structure/personal-offer/personal-offer.component.ts

...rofile/profile-structure/profile-structure.component.html

...rofile/profile-structure/profile-structure.component.scss

.../profile/profile-structure/profile-structure.component.ts

src/app/shared/components/index.ts

.../training-type-picker/training-type-picker.component.html

.../training-type-picker/training-type-picker.component.scss

...ts/training-type-picker/training-type-picker.component.ts

...app/shared/components/v3/checkbox/checkbox.component.html

...app/shared/components/v3/checkbox/checkbox.component.scss

src/app/shared/components/v3/checkbox/checkbox.component.ts

src/app/shared/components/v3/checkbox/checkbox.stories.ts

src/app/shared/components/v3/checkbox/indeterminate-grey.svg

src/app/shared/components/v3/checkbox/indeterminate.svg

...3/collapse/collapse-content/collapse-content.component.ts

...3/collapse/collapse-header/collapse-header.component.scss

.../v3/collapse/collapse-header/collapse-header.component.ts

...app/shared/components/v3/collapse/collapse.component.scss