fix: correct repository, homepage, and bugs URLs in package.json

[brainsparker]

Why

package.json points repository, homepage, and bugs at github.com/briansparker/You, which is not this repository. Once the package is published to npm, these fields drive the links shown on the npm package page, so they should be correct before the first publish.

What changed

• repository: git+https://github.com/brainsparker/you.md.git
• homepage: https://github.com/brainsparker/you.md#readme
• bugs: https://github.com/brainsparker/you.md/issues

Validation

• Metadata only, no code changes
• npm run build and the full test suite (145/145) pass locally on Node 24

Publish readiness notes

The rest of the manifest already looks publish-ready: files whitelist covers dist and bin, both bin entries exist, and prepublishOnly runs build plus tests. Two things to know before running npm publish:

1. The name you-md is currently unpublished on npm, so the README instruction npx you-md fails for users today. Publishing this package fixes that.
2. The nearby name youmd is owned by an unrelated, actively maintained project (Houston Golden's identity context CLI, v0.13.x). Worth publishing soon to establish the you-md name, and worth a disambiguation note in the README at some point.