feat : adds functionality to import and export IPNS keys in the IPFS WebUI

[shobit000]

Summary

This PR adds functionality to import and export IPNS keys in the IPFS WebUI.

Changes

• Added functions for importing and exporting IPNS keys in src/bundles/ipns.js.
• Updated IpnsManager component to include UI elements for importing and exporting IPNS keys in src/components/ipns-manager/IpnsManager.js.
• Added translation strings for "Import Key" and "Export Key" in public/locales/en/settings.json.

[welcome[bot]]

Thank you for submitting this PR! A maintainer will be here shortly to review it. We are super grateful, but we are also overloaded! Help us by making sure that:

• The context for this PR is clear, with relevant discussion, decisions and stakeholders linked/mentioned.

• Your contribution itself is clear (code comments, self-review for the rest) and in its best form. Follow the code contribution guidelines if they apply.

Getting other community members to do a review would be great help too on complex PRs (you can ask in the chats/forums). If you are unsure about something, just leave us a comment. Next steps:

• A maintainer will triage and assign priority to this PR, commenting on any missing things and potentially assigning a reviewer for high priority items.

• The PR gets reviews, discussed and approvals as needed.

• The PR is merged by maintainers when it has been approved and comments addressed.

We currently aim to provide initial feedback/triaging within two business days. Please keep an eye on any labelling actions, as these will indicate priorities and status of your contribution. We are very grateful for your contribution!

[shobit000]

sorry for the commits i made in this file after i mentioned this pull request , was solving another issue but got committed in this branch

[shobit000]

yeah will be working on this

[shobit000]

updated ipns.js file with the chages