RI-7634: notifications

[pd-redis]

This pull request fixes inconsistent behavior of infinite notifications, introduces comprehensive Storybook stories for the Notifications component, enabling easier testing and visualization of error, infinite, and message notifications.

Storybook Stories for Notifications

• Added ErrorNotifications.stories.tsx with interactive buttons to trigger various error notifications for manual testing and demonstration.
• Added InfiniteNotifications.stories.tsx to showcase infinite (ongoing) notifications, covering scenarios like authentication, database creation, and app updates.
• Added MessageNotifications.stories.tsx to demonstrate success and informational message notifications, including bulk actions, key operations, and library management.

Component Improvements

• refactored different notification types in separate hook files
• ensure that only one infinite notification of certain type is shown at a time

Remove unused styles

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
3 out of 4 committers have signed the CLA.

✅ dantovska
✅ KrumTy
✅ pd-redis
❌ Kristiyan Ivanov

---

Kristiyan Ivanov seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[pd-redis]

Ignore the huge number of files, this PR depends on #5062 to be merged first

[valkirilov]

I don't see clear retro steps and expected behavior either in the ticket and here in the pull request description, so maybe I didn't test it the way it should.

But based on the info in the ticket, I'm not sure whether it's working fine or not, because I see stacked notifications when I create a free cloud database.

Previous messages are not closed when creating a free Cloud db
Messages describing steps are not automatically closed when the step is completed.

1. Go to the Databases tab
2. Click on the "+ Add Redis Database" button
3. Click on the "New database" box
4. Click "Confirm" in the modal and wait for the database to be created

For some time, I see the same notification twice (see "Processing Cloud API keys"

Then, after clicking the "Create" button to initiate the process, I still see the previous toasts

And these toast stay forever, until I close them.