Move assets into separate folder

frontend/src/assets/images/logo.svg

frontend/src/assets/images/user.png

frontend/src/assets/scss/bootstrapV5/_alert.scss

frontend/src/assets/scss/bootstrapV5/_badge.scss

frontend/src/assets/scss/bootstrapV5/_breadcrumb.scss

frontend/src/assets/scss/bootstrapV5/_button-group.scss

frontend/src/assets/scss/bootstrapV5/_buttons.scss

frontend/src/assets/scss/bootstrapV5/_card.scss

frontend/src/assets/scss/bootstrapV5/_carousel.scss

frontend/src/assets/scss/bootstrapV5/_close.scss

frontend/src/assets/scss/bootstrapV5/_containers.scss

frontend/src/assets/scss/bootstrapV5/_dropdown.scss

frontend/src/assets/scss/bootstrapV5/_forms.scss

frontend/src/assets/scss/bootstrapV5/_functions.scss

frontend/src/assets/scss/bootstrapV5/_grid.scss

frontend/src/assets/scss/bootstrapV5/_helpers.scss

frontend/src/assets/scss/bootstrapV5/_images.scss

frontend/src/assets/scss/bootstrapV5/_list-group.scss

frontend/src/assets/scss/bootstrapV5/_mixins.scss

frontend/src/assets/scss/bootstrapV5/_modal.scss