Add link to each tool's documentation to README

[jawn]

The current README does not provide details on what each tool does.

I suggest to add the Overview + video links to the README, as found in the settings:

Let me know if I can submit a PR for this.

The goal of this is to help readers learn about each tool before installing it, or skipping the PowerToys because it's unclear what each tool does.

[jawn]

Turns out this stuff is already in the README, in the section, current PowerToy Utilities.

[crutkas]

Settings v2 (#889) and OOBE (#1285), these are requirements :)

Great callout.

[crutkas]

FYI, we have a public branch for the new settings system too if you want to poke around there.