Support node 24 and 26

Node 18 and 20 are both EOL as of May 2026. Attempting to install an aio-cli plugin which requires `@adobe/aio-cli-plugin-aem-rde` fails under Node 24 with:

```
./node_modules/.bin/aio plugins:install @adobe/aio-cli-plugin-cloudmanager@latest
npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE package: '@adobe/aio-cli-plugin-aem-rde@2.0.1',
npm warn EBADENGINE required: { node: '^18 || ^20 || >= 22.15 <23', npm: '>= 8.0.0' },
npm warn EBADENGINE current: { node: 'v24.15.0', npm: '10.9.8' }
npm warn EBADENGINE }
up to date in 345ms
```

Please update and add support for the latest Node.js versions. Node 24 is current LTS, Node 26 release is imminent.

Start by locating the package metadata and any Node-version configuration that declares supported runtimes, then reproduce the reported plugin installation under Node 24. Update the supported-version declarations for Node 24 and 26 and verify that the installation no longer emits the reported EBADENGINE warning.

Written by the indexing model from the issue text.