Importing SVG 
This tutorial is part of import functions documentation in Iconify Tools.
There is no special function for importing one icon because it is redundant. All you have to do is read content and create new SVG instance:
Example 
example.ts
ts
import { promises as fs } from 'fs';
import {
    SVG,
    blankIconSet,
    cleanupSVG,
    runSVGO,
    parseColors,
    isEmptyColor,
 } from '@iconify/tools';
 (async () => {
    // Create an empty icon set
    const iconSet = blankIconSet('test');
    // Read icon, create SVG instance
    const content = await fs.readFile('files/home.svg', 'utf8');
    const svg = new SVG(content);
    // Clean up icon code
    cleanupSVG(svg);
    // Assume icon is monotone: replace color with currentColor, add if missing
    // If icons are not monotone, remove this code
    parseColors(svg, {
        defaultColor: 'currentColor',
        callback: (attr, colorStr, color) => {
            return !color || isEmptyColor(color) ? colorStr : 'currentColor';
        },
    });
    // Optimise
    runSVGO(svg);
    // Add icon to icon set
    iconSet.fromSVG('home', svg);
 })();