[FEAT] Update Web to show new support for Swift Packages.

[mkaulfers]

User Story

• As a user visiting the iconoir website, I would like to know that swift packages are supported, so that I can integrate it into my project.

Acceptance Criteria

• Update the Available For section.
• Use the apple-swift Iconoir Logo.
• No Text Required
• On Click, links to https://github.com/iconoir-icons/iconoir-swift
• Update the Tell Us More doc.

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• Thank you in advance for helping prioritize & fund our backlog.

[sammarks]

Cc @lucaburgio maybe you can mock up what this might look like on the site so we can get a PR going?