Project Browser: Create a logo for Key

Opening this per: 📌 Project Browser: Create a logo for Encrypt Needs work

This will be worked on in parallel so there will be two logos that are similar. Here's the working version so far:

Keeping assigned to me as Jacob and I work through both issues.

Updated other issue with next steps.

This is a duplicate of https://www.drupal.org/project/project_browser/issues/3298491 📌 Key Project - Update logo RTBC . The logo that was created by the community on that issue is attached here as logo.png.

MAINTAINERS:
Please consider adding this logo. The logo will be displayed in the Project Browser (as well as on drupalcode.org as your project avatar, and on drupal.org on your project page).

Proposed resolution

If you decide to use the proposed logo, it should be this exact image as we have already ensured it meets requirements for file type, size, etc.

Remaining tasks

INSTRUCTIONS: The logo should be added to the root folder of the repo, and be named logo.png. This must be present on your project’s default branch.

If you have previously added a logo as the first image in the Images field on your project page, please remove it. Project Browser will no longer be using the first image as the logo.

Note - the svg logo is attached here (key.svg_.txt for maintainers to store in case future changes are needed.

Ah! Haha. The encrypt issue discussion talked about pulling out the key from the other logo but all good 👍 sorry for leaving assigned to me. XB demo took over my life