implementing acessibility

src/Components/UploadPageComponents/PartThree.js

src/Components/UploadPageComponents/PartTwo.js

...ageComponents/PartTwoComponents/CustomCircularProgress.js

...ploadPageComponents/PartTwoComponents/DisplayThumbnail.js

...dPageComponents/PartTwoComponents/DragAndDropThumbnail.js

...s/UploadPageComponents/PartTwoComponents/EditThumbnail.js

...ploadPageComponents/PartTwoComponents/EducationalStage.js

...ponents/UploadPageComponents/PartTwoComponents/Licenca.js

...loadPageComponents/PartTwoComponents/SubjectsAndThemes.js

src/Components/UploadPageComponents/StyledComponents.js

src/Pages/UploadPage.js

src/env.js