Consolidate and modernize SCSS into global styles

Move component-level styles into src/styles.scss and remove duplicated rules from several component SCSS files (app, topbar, about, algorithms, sorting, imprint, project dialog, projects, babylon-canvas). The global stylesheet now centralizes layout and typography (clamp-based sizing), sorting visualization & canvas rules, topbar/menu overrides, project/swiper styles, and shared utilities. This reduces duplication, improves responsiveness, and simplifies stylesheet management.

src/app/pages/imprint/imprint.component.scss

@@ -1,40 +0,0 @@
-.imprint {
-  display: grid;
-  gap: 1rem;
-}
-
-.imprint-card {
-  padding: 1.25rem 1.5rem;
-}
-
-.imprint-title {
-  margin: 0 0 1rem;
-  font-size: 1.1rem;
-  font-weight: 600;
-}
-
-.imprint-section {
-  display: grid;
-  gap: 0.25rem;
-
-  &:not(:last-child) {
-    margin-bottom: 1rem;
-  }
-}
-
-.imprint-label {
-  font-size: 0.75rem;
-  letter-spacing: 0.04em;
-  text-transform: uppercase;
-  opacity: 0.7;
-  margin: 0;
-}
-
-a {
-  color: var(--mat-primary);
-  text-decoration: none;
-
-  &:hover {
-    text-decoration: underline;
-  }
-}