SWE Escalation

[MsMaddie05]

Describe your changes

​Escalated notification setting - Frontend implementation
Escalated notification is properly saved along with monitor information,
persists upon reload. - Backend implementation
Email notification sent according to escalated notification channel (include a screenshot of the email notification in the submission)

Write your issue number after "Fixes "

Fixes #204

Please ensure all items are checked off before requesting a review. "Checked off" means you need to add an "x" character between brackets so they turn into checkmarks.

• [X ] (Do not skip this or your PR will be closed) I deployed the application locally.
• [ X] (Do not skip this or your PR will be closed) I have performed a self-review and testing of my code.
• [X ] I have included the issue # in the PR.
• [X ] I have added i18n support to visible strings (instead of <div>Add</div>, use):

const { t } = useTranslation();
<div>{t('add')}</div>

• [ X] I have not included any files that are not related to my pull request, including package-lock and package-json if dependencies have not changed
• [X ] I didn't use any hardcoded values (otherwise it will not scale, and will make it difficult to maintain consistency across the application).
• [X ] I made sure font sizes, color choices etc are all referenced from the theme. I don't have any hardcoded dimensions.
• [X ] My PR is granular and targeted to one specific feature.
• [X ] I ran npm run format in server and client directories, which automatically formats your code.
• [X ] I took a screenshot or a video and attached to this PR if there is a UI change.