v0.4 Security improvements & bug fixes

What's Changed

• meowshell agent: a persistent, multiplexed SSH daemon with general-host support by @Sniperlyf3 in #16
• Strip all comments repo-wide, restore minimal public doc comments by @Sniperlyf3 in #17
• Harden proxy, forwarding, and build security by @Sniperlyf3 in #18
• Bump actions/setup-dotnet from 4.3.1 to 6.0.0 by @dependabot[bot] in #19
• Bump actions/setup-go from 5.6.0 to 7.0.0 by @dependabot[bot] in #21
• Bump github.com/pkg/sftp from 1.13.6 to 1.13.11 by @dependabot[bot] in #23
• Bump actions/checkout from 4.4.0 to 7.0.1 by @dependabot[bot] in #20
• Bump actions/upload-artifact from 4.6.2 to 7.0.1 by @dependabot[bot] in #22
• Bump actions/download-artifact from 4.3.0 to 8.0.1 by @dependabot[bot] in #24
• Add a self-hosted DERP relay for CI E2E tests by @Sniperlyf3 in #25
• Meowshell agent daemon by @Sniperlyf3 in #26

New Contributors

• @dependabot[bot] made their first contribution in #19

Full Changelog: v0.3...v0.4