added share button for bluesky

[quaintdev]

What does this PR change? What problem does it solve?

Adds share button for bluesky. The socials button already existed but share button on each post was missing.

Was the change discussed in an issue or in the Discussions before?

Yes but the issue was closed by adding the bluesky icon on socials

PR Checklist

• This change adds/updates translations and I have used the template present here.
• I have enabled maintainer edits for this PR.
• I have verified that the code works as described/as intended.
• This change adds a Social Icon which has a permissive license to use it.
• This change does not include any CDN resources/links.
• This change does not include any unrelated scripts such as bash and python scripts.
• This change updates the overridden internal templates from HUGO's repository.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[adityatelange]

bluesky is decentralised.

[quaintdev]

Yeah I thought about it but then I asked Claude and this is what it said:

Bluesky's decentralization is quite different from Mastodon's. While Bluesky is technically decentralized using the AT Protocol, it currently operates more like a single unified network rather than multiple separate instances like Mastodon.

We can safely use share button because only personal data is stored on different servers. The feed is still unified as of now.

[chicks-net]

Thank you for working on this. I've had this on my todo list. I'm looking forward to this getting through to a release.

Note: this will complete #1376 that was partially done and closed early.