Angular UI: Move ChartComponent to @abp/ng.components/chart.js

[mehmet-erim]

Resolves #7472

Chart.js is lazy-loaded by @abp/theme.shared after app initialization (before v5.0). Loading the chart.js is redundant if you don't use the ChartComponent. So we handled this case and decided to move ChartComponent to another package (@abp/ng.components/chart.js). As of v5.0, if you do not import ChartModule, the chart.js script will not be loaded.

In this PR, there are some changes that may break your app:

• You should import the ChartModule to use the abp-chart as shown below:

import { ChartModule } from '@abp/ng.components/chart.js';

@NgModule({ 
  imports: [
    ChartModule,
    // ...
  ],
  // ...
})

export class YourFeatureModule { }

• chartJsLoaded$ subject has been removed
• getRandomBackgroundColor function moved to @abp/ng.components/chart.js

Usage of the ChartComponent document will be added. (#10083)