Add support for Angular 18

[daine]

📇 User story

This was a user submitted issue, where they had issues running npm install with @cdssnc/gcds-components-angular because the angular version in that package only supports up to version 16.

• As a developer using the GCDS Components Angular package, I want to be able to run npm install without --legacy-peer-deps, so I can keep strict dependency resolution.

✅ Definition of Done / Outcomes

• @cdssnc/gcds-components-angular is on version angular 18+

📜 Acceptance criteria

Add here the list of assumed steps that will be needed to complete the task

• [ ]
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📝 More info

Stackblitz:
https://stackblitz.com/github/AlexisLeblancDFO/gcds-angular18-form?file=README.md

. 🚫 Out of scope
_ If possible, give precisions on what is not part of this work_

[daine]

Closing, duplicate ticket of: cds-snc/gcds-components#628