Added profile-header component. Implemented follower feature

src/app/users/components/profile-header/profile-header.html

@@ -0,0 +1,56 @@
+<div class="card">
+
+  <div class="card-image">
+    <div class="image app-profile-header-cover" [class.is-skeleton]="!userStore.isUserLoaded()">
+      <!-- Todo change cover image -->
+      <img src="https://images.pexels.com/photos/1103970/pexels-photo-1103970.jpeg" alt="">
+    </div>
+  </div>
+
+  <div class="card-content">
+    <!-- Avatar -->
+    <div class="image is-128x128 app-profile-header-avatar block" [class.is-skeleton]="!userStore.isUserLoaded()">
+      <img [src]="userStore.getAvatarUrl()" [alt]="userStore.getUserFullName()" class="is-rounded">
+    </div>
+    <!-- Main -->
+    <div class="block">
+      <div class="level">
+        <!-- Name -->
+        <div class="level-left">
+          <div class="level-item">
+            <div class="block app-profile-name">
+              <p class="title is-3" [class.is-skeleton]="!userStore.isUserLoaded()">{{ userStore.getUserFullName() }}</p>
+              <p class="subtitle is-5" [class.is-skeleton]="!userStore.isUserLoaded()">{{ userStore.user()?.headline }}</p>
+            </div>
+          </div>
+        </div>
+        <!-- Featured -->
+        @if (userStore.isUserLoaded()){
+          <div class="level-right">Featured</div>
+        }
+      </div>
+    </div>
+
+    <!-- Actions -->
+    <div class="block">
+      @if (userStore.isCurrentUser()){
+        <div class="buttons">
+          <button type="button" matButton="outlined">Edit profile</button>
+        </div>
+      } @else {
+        <div class="buttons">
+          @if (followerStore.isLoaded()){
+            @if (followerStore.isSubscribed()){
+              <!-- Subscribed -->
+              <button type="button" matButton="outlined" (click)="onUnfollowClicked()">Unfollow</button>
+            } @else {
+              <!-- Not subscribed -->
+              <button type="button" matButton="filled" (click)="onFollowClicked()">Follow</button>
+            }
+          }
+        </div>
+      }
+    </div>
+  </div>
+
+</div>