docs: Update Asset Management guide to ES Modules syntax, and fix package.json formatting

Author: DeekshaVarshney123

src/content/guides/asset-management.mdx

@@ -44,9 +44,9 @@ Let's make a minor change to our project before we get started:
 **webpack.config.js**
 
 ```diff
- const path = require('path');
+ import path from 'path';
 
- module.exports = {
+ export default {
    entry: './src/index.js',
    output: {
 -    filename: 'main.js',
@@ -67,9 +67,9 @@ npm install --save-dev style-loader css-loader
 **webpack.config.js**
 
 ```diff
- const path = require('path');
+ import path from 'path';
 
- module.exports = {
+ export default {
    entry: './src/index.js',
    output: {
      filename: 'bundle.js',
@@ -171,9 +171,9 @@ So now we're pulling in our CSS, but what about our images like backgrounds and
 **webpack.config.js**
 
 ```diff
- const path = require('path');
+ import path from 'path';
 
- module.exports = {
+ export default {
    entry: './src/index.js',
    output: {
      filename: 'bundle.js',
@@ -284,9 +284,9 @@ So what about other assets like fonts? The Asset Modules will take any file you
 **webpack.config.js**
 
 ```diff
- const path = require('path');
+ import path from 'path';
 
- module.exports = {
+ export default {
    entry: './src/index.js',
    output: {
      filename: 'bundle.js',
@@ -395,9 +395,9 @@ npm install --save-dev csv-loader xml-loader
 **webpack.config.js**
 
 ```diff
- const path = require('path');
+ import path from 'path';
 
- module.exports = {
+ export default {
    entry: './src/index.js',
    output: {
      filename: 'bundle.js',
@@ -579,12 +579,12 @@ And configure them in your webpack configuration:
 **webpack.config.js**
 
 ```diff
- const path = require('path');
-+const toml = require('toml');
-+const yaml = require('yamljs');
-+const json5 = require('json5');
+ import path from 'path';
++import toml from 'toml';
++import yaml from 'yamljs';
++import json5 from 'json5';
 
- module.exports = {
+ export default {
    entry: './src/index.js',
    output: {
      filename: 'bundle.js',
@@ -732,12 +732,12 @@ For the next guides we won't be using all the different assets we've used in thi
 **webpack.config.js**
 
 ```diff
- const path = require('path');
--const toml = require('toml');
--const yaml = require('yamljs');
--const json5 = require('json5');
+ import path from 'path';
+-import toml from 'toml';
+-import yaml from 'yamljs';
+-import json5 from 'json5';
 
- module.exports = {
+ export default {
    entry: './src/index.js',
    output: {
      filename: 'bundle.js',