[Editor]: Disable non-implemented buttons

[cmoinier]

Description

This PR disables buttons that are not implemented yet. It concerns :

• Create record from template (import dropdown)
• Editor top toolbar : open panel / lightbulb / download / question mark / check
• Dashboard top toolbar : notifications / chat / settings --> Note : for these buttons, ngClass was used to keep the old class (instead of just replacing the current one) and not loose the "normal" styling of the buttons for when this will be reverted.
• Side Panel : discussion / calendar / contacts / thesaurus / templates --> Note : ngClass was also used to make sure the buttons are not clickable (but hoverable for the tooltip) & to keep the "normal" route for when this will be reverted.

Quality Assurance Checklist

• Commit history is devoid of any merge commits and readable to facilitate reviews
• If new logic ⚙️ is introduced: unit tests were added
• If new user stories 🤏 are introduced: E2E tests were added
• If new UI components 🕹️ are introduced: corresponding stories in Storybook were created
• If breaking changes 🪚 are introduced: add the breaking change label
• If bugs 🐞 are fixed: add the backport <release branch> label
• The documentation website 📚 has received the love it deserves

[github-actions]

Affected libs: feature-editor,
Affected apps: metadata-editor, datafeeder, demo,

• 🚀 Build and deploy storybook and demo on GitHub Pages
• 📦 Build and push affected docker images

[github-actions]

📷 Screenshots are here!

[coveralls]

coverage: 82.189% (-1.6%) from 83.787%
when pulling 0512152 on ME/disable-buttons
into 86d11dd on main.

[jahow]

Thanks!