Add a "Brave page" like indicator for IPFS schemes

[bbondy]

This issue was broken out from @jessicaschilling's issue posted here: #13125

Other than looking at the address bar, it would be good to show when the user is using their local IPFS node via. aURL bar indicator similar to the Brave one.

Clicking on IPFS icon here could open brave://ipfs diagnostic page (or a better UI in the future).
A better UI would be a flyout view that has information about the connection.

[jessicaschilling]

+1 for a flyout view here! Content in the flyout could be something like ...

Resources loaded over IPFS
One or more resources on this site were loaded using your IPFS node, which is currently connected to XX peers. Learn more

It's also important to consider that there may be cases in which a page might display both another informational icon - maybe a "secure padlock" and an IPFS cube, or the "Not Secure" message and an IPFS cube. There's an opportunity here to make a decision that will ultimately impact every browser 😊 in a way that the original addition of the "secure padlock" icon did ... so this is definitely worth some careful thought before implementing. Would be very happy to be more deeply involved here once you're ready to move this into your active list.

[spylogsster]

The first PR for the badge created brave/brave-core#8234 and security review for this https://github.com/brave/security/issues/368

The dialog would change incrementally after with separate security issue

[stephendonner]

Verified PASSED using nightly build

Brave	1.24.11 Chromium: 89.0.4389.90 (Official Build) nightly (x86_64)
Revision	62eb262cdaae9ef819aadd778193781455ec7a49-refs/branch-heads/4389@{#1534}
OS	macOS Version 11.2.3 (Build 20D91)

Checked:

1. shows up for both ipfs and ipns URLs: ipfs://bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/wiki/Vincent_van_Gogh.html, ipfs://bafybeigdyrzt5sfp7udm7hu76uh7y26nf3efuylqabf3oclgtqy55fbzdi/, ipns://brantly.eth, ipns://en.wikipedia-on-ipfs.org, on both dark and light themes

Example	Example	Example	Example	Example	Example

2. shows up for interstitial-installation page

3. doesn't show up for brave://ipfs-internals pages

Example	Example

4. doesn't show up for https://en-wikipedia--on--ipfs-org.ipns.dweb.link/wiki/ and https://en.wikipedia-on-ipfs.org/wiki/

Example	Example