feat: add release 2.0 banner

src/app/@theme/components/banner/_banner.component.theme.scss

@@ -0,0 +1,26 @@
+@import '../../styles/themes';
+
+@mixin ngx-release-banner-component {
+  ngx-release-banner {
+    background-color: nb-theme(release-banner-bg);
+    color: nb-theme(release-banner-fg);
+
+    .heading-with-icon {
+      border-bottom-color: nb-theme(release-banner-separator);
+    }
+
+    .banner-heading,
+    .close-button {
+      color: nb-theme(release-banner-fg);
+    }
+
+    .cta {
+      color: nb-theme(release-banner-cta);
+    }
+
+    .cta-link {
+      background: nb-theme(release-banner-fg);
+      color: nb-theme(release-banner-bg);
+    }
+  }
+}

src/app/@theme/components/banner/banner.component.scss

@@ -0,0 +1,58 @@
+@import '../../styles/themes';
+
+:host {
+  position: fixed;
+  @include nb-ltr(right, 1.5rem);
+  @include nb-rtl(left, 1.5rem);
+  top: 8vh;
+  border-radius: 5px;
+  box-shadow: 0 5px 12px 0 rgba(0, 32, 128, 0.14);
+  z-index: 99999999;
+
+  .heading-with-icon {
+    border-bottom-width: 1px;
+    border-bottom-style: solid;
+    display: flex;
+    align-items: center;
+  }
+
+  .icon {
+    height: auto;
+    width: 4rem;
+    margin: 0 1.625rem;
+  }
+
+  .banner-heading {
+    font-size: 1.5rem;
+    line-height: 1.5;
+    font-weight: 600;
+    margin: 1.625rem 0;
+  }
+
+  .close-button {
+    background: none;
+    border: none;
+    cursor: pointer;
+    margin-bottom: auto;
+    padding: 0.625rem;
+  }
+
+  .nb-close {
+    font-size: 1.5rem;
+    font-weight: 600;
+  }
+
+  .cta {
+    margin: 0;
+    text-align: center;
+  }
+
+  .cta-link {
+    border-radius: 1.8px;
+    display: inline-block;
+    padding: 0.5rem 1rem;
+    margin: 0.725rem 0.8rem;
+    text-transform: uppercase;
+    font-weight: 600;
+  }
+}

src/app/@theme/components/banner/banner.component.ts

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+import { Component, HostBinding, Inject, OnDestroy, OnInit } from '@angular/core';
+import { NB_WINDOW, NbThemeService } from '@nebular/theme';
+import { takeWhile } from 'rxjs/operators';
+
+const HIDE_BANNER_KEY = 'HIDE_RELEASE_2_BANNER';
+
+@Component({
+  selector: 'ngx-release-banner',
+  template: `
+    <div class="heading-with-icon">
+      <img class="icon" [src]="getBellPath()" alt="bell">
+      <h1 class="banner-heading">Nebular 2.0 stable <br> with 30+ components is out!</h1>
+      <button class="close-button" aria-label="close" (click)="closeBanner()">
+        <span class="nb-close"></span>
+      </button>
+    </div>
+    <p class="cta">
+      Don't forget to <a class="cta-link" href="https://github.com/akveo/nebular">check out</a> and star our repo :)
+    </p>
+  `,
+  styleUrls: ['./banner.component.scss'],
+})
+export class BannerComponent implements OnInit, OnDestroy {
+
+  private alive = true;
+  storage: Storage;
+  isDarkTheme: boolean;
+
+  @HostBinding('attr.hidden')
+  isHidden: true | null = null;
+
+  @HostBinding('attr.dir')
+  dir = 'ltr';
+
+  constructor(
+    @Inject(NB_WINDOW) private window,
+    private themeService: NbThemeService,
+  ) {}
+
+  ngOnInit() {
+    this.storage = this.window.localStorage;
+
+    this.isHidden = this.storage && this.storage.getItem(HIDE_BANNER_KEY)
+      ? true
+      : null;
+
+    this.isDarkTheme = this.themeService.currentTheme === 'cosmic';
+    this.themeService.onThemeChange()
+      .pipe(takeWhile(() => this.alive))
+      .subscribe(({ name }) => this.isDarkTheme = name === 'cosmic');
+  }
+
+  closeBanner() {
+    if (this.storage) {
+      this.storage.setItem(HIDE_BANNER_KEY, 'true');
+    }
+    this.isHidden = true;
+  }
+
+  getBellPath() {
+    return `assets/images/bell${this.isDarkTheme ? '' : '-white'}.svg`;
+  }
+
+  ngOnDestroy() {
+    this.alive = false;
+  }
+}