feat(sig): Inbox toolbar disabled clarity

[Twixes]

Problem

It is really key that it's clear why a button is disabled. Otherwise you hover on something like below that appears clickable, but frustratingly nothing happens:

Changes

Importing the disabledReason tooltip solution from the main PostHog app - the tooltip explains what's going on:

Also fixes a bug where we said "5 report snoozeds" instead of "5 reports snoozed".

Also, giving the checkbox hover and active style to create joy and clarity in interaction.

[Twixes]

• feat(sig): Report list toolbar as core control #1532
• feat(sig): Inbox toolbar disabled clarity #1531 👈 (View in Graphite)
• style(sig): Inbox list chrome cleanup #1530
• feat(sig): add modifying report state via inbox #1513 : 1 other dependent PR (#1543 )
• feat(sig): break inbox into some components #1505
• main

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[Twixes]

Tagging @team-code and @adamleithp, as we're adding a new Button component here

[Twixes]

Merge activity

• Apr 8, 10:43 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Apr 8, 10:56 AM UTC: Graphite couldn't merge this PR because it had merge conflicts.
• Apr 8, 2:18 PM UTC: @Twixes merged this pull request with Graphite.