docs: clarify source license wording

[richiemcilroy]

Summary

• Correct the Introduction's description of Cap's source license.
• Align the About page with the repository LICENSE: most source is AGPLv3, while the camera and capture crate families are MIT.

This is a documentation correction pending review. The live site has not changed.

Verification

• Compared the wording with the repository LICENSE and public documentation.
• Ran the scoped Biome check on the changed TypeScript file.
• Ran git diff --check.

Confidence Score: 5/5

The PR appears safe to merge; no outstanding findings remain.

Summary

The PR corrects the Introduction’s license description and makes the About page name the MIT-licensed crate families precisely. The current wording matches the repository’s license declaration.

_{Reviews (3) · Last reviewed commit: "docs: name the MIT crate families on the..."}

[richiemcilroy]

hey @greptileai, please re-review the PR

[richiemcilroy]

hey @greptileai, please re-review the PR