This adds context actions such as "Copy IPFS path", "Copy CID", "Pin"
to DNSLink websites without redirect.

It includes refactoring of ipfsPathValidator to expose high level
resolvers:

- resolveToPublicUrl: always return a meaningful, publicly accessible
URL that can be accessed without the need of IPFS client.
- resolveToIpfsPath: return a valid IPFS path that can be accessed with
IPFS client.
- resolveToImmutableIpfsPath: same as resolveToIpfsPath, but the path is
always immutable /ipfs/
- resolveToCid: returnis direct CID without anything else

js-ipfs v0.34 does not support DNSLinks in ipfs*resolve methods:
ipfs/js-ipfs#1918

This temporary workaround detects known errors and falls back to
using path from DNSLink cache. It won't be as fresh as original,
but at least resolv will work.

In past we closed menu after toggling pin status, but now we have nice
visual toggle switch and other uses of the switch do not close the menu.

To unify the UX pin/unpin will keep the menu open.