Add pause icon

[smockle]

I reviewed and followed the steps in “Adding or updating an icon”.

This PR adds a new pause icon (represented by parallel vertical lines).

GitHub uses a similar icon in two places:

• github/animated-image-player’s index.html#L28-L31, used to pause animated GIF playback, as mentioned in GitHub Blog’s “Option to prevent animated images from playing automatically” (“…a play/pause button…”). This PR adapts github/animated-image-player’s icon.

• primer/brand’s PauseIcon.tsx#L4-L7, used by Primer Brand’s VideoPlayer component. As github/primer#2448 (comment) (only accessible to Hubbers) notes:

  The…pause icons are hard-coded, rather than being pulled from Octicons. The reason for this is that Octicons doesn't have a pause icon…

[smockle]

The CI / npm:@primer/octicons-react (pull_request) check is failing with:

Snapshot name: @primer/octicons-react should not update exports without a semver change 1

@CameronFoxly @TylerJDev (reviewers) — Could y’all please advise on how to resolve this? Should I push a commit that bumps the version number in package.json? If so, would this be considered a minor version bump?

[TylerJDev]

Hey @smockle! I think for npm:@primer/octicons-react, we need to add the icon to public-api.test.js.snap. I think this can be done locally via yarn test -u, which should produce an update to that file.

[smockle]

@TylerJDev Thanks! I updated the snapshot in b2af2e0; that fixed the lint issue.

There’s a new failure in an optional check, but it isn’t one introduced by my PR. It’s failing in main too. #1072 should fix it.

[TylerJDev]

Looks like this changed, not sure if this was intentional 🤔

[smockle]

Looks like that was changed by a bot in 0e6838e 🤔

[smockle]

I reverted the bot’s commit in d443aaa. I’m curious if it’ll re-add it.

[smockle]

Yup, the bot re-added the commit: 757444b. 🤷

[TylerJDev]

My assumption is that it's caused by this PR: #1050. I'm guessing the icon didn't go through the "optimization" step, which is why it's being optimized in this PR. Overall, I don't see a difference, so I think it's fine.

[TylerJDev]

LGTM!