feat: add site header

src/app/components/main-header/main-header.html

@@ -0,0 +1,8 @@
+<div class="bar-container">
+    <div class="bar-container__elements">
+        <div class="bar-container__action-button bar-container__action-button--left">
+            <ng-content select="[slot='action-button']"></ng-content>
+        </div>
+        <h1 class="bar-container__title">{{title()|titlecase}}</h1>
+    </div>
+</div>

src/app/components/main-header/main-header.scss

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+.bar-container {
+  background-color: var(--primaryDark);
+  width: 100%;
+  
+  &__elements {
+    position: relative;
+    display: flex;
+    flex-direction: column;
+    margin: auto;
+    max-width: 1100px;
+  }
+
+  &__title {
+    display: flex;
+    justify-content: center;
+  }
+
+  &__action-button {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    justify-content: center;
+    &--left {
+      position: absolute;
+    }
+  }
+
+}

src/app/components/main-header/main-header.spec.ts

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+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { MainHeader } from './main-header';
+
+describe('MainHeader', () => {
+  let component: MainHeader;
+  let fixture: ComponentFixture<MainHeader>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [MainHeader]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(MainHeader);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/components/main-header/main-header.ts

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+import { Component, input } from '@angular/core';
+import { TitleCasePipe } from '@angular/common';
+
+@Component({
+  selector: 'app-main-header',
+  imports: [TitleCasePipe],
+  templateUrl: './main-header.html',
+  styleUrl: './main-header.scss',
+})
+export class MainHeader {
+  title = input('');
+}