Add ShortNumberPipe for formatting large numbers with suffixes; include unit tests for pipe functionality

src/angular/frontend/src/app/pipes/short-number.pipe.spec.ts

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+import { ShortNumberPipe } from './short-number.pipe';
+
+describe('ShortNumberPipe', () => {
+  it('create an instance', () => {
+    const pipe = new ShortNumberPipe();
+    expect(pipe).toBeTruthy();
+  });
+});

src/angular/frontend/src/app/pipes/short-number.pipe.ts

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+import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'shortNumber',
+  pure: true
+})
+export class ShortNumberPipe implements PipeTransform {
+
+  private readonly suffixes = ['k', 'M', 'G', 'T', 'P', 'E'];
+
+  transform(input: number, maxDecimals: number = 0): string {
+
+    if (Number.isNaN(input)) {
+      return 'NaN';
+    }
+
+    if (input < 1000) {
+      return input.toString();
+    }
+
+    const exp = Math.floor(Math.log(input) / Math.log(1000));
+    const fixed = (input / Math.pow(1000, exp)).toFixed(maxDecimals + 1);
+    const split = fixed.split('.');
+    const integer = split[0];
+    const decimal = split.length > 1 ? (+(+('0.' + split[1])).toFixed(maxDecimals + 1)).toString().slice(2) : null;
+    const d = decimal && decimal.length > maxDecimals ? decimal.slice(0, maxDecimals) : decimal;
+    const sliced = integer + (d ? '.' + d : '');
+    const suffix = this.suffixes[exp - 1];
+
+    return `${sliced} ${suffix}`;
+  }
+
+}