ci: add CI, release, and tag-release workflows + GitHub Pages landing page - #2

api.Server.handleHelp calls http.response.WriteHeader, which eventually calls tls.Conn.Write

auth.GenerateHandle calls rand.Read, which eventually calls tls.Conn.Read

linksmith.main calls http.ListenAndServe, which eventually calls tls.Conn.HandshakeContext

auth.GenerateHandle calls rand.Read, which eventually calls x509.Certificate.Verify

auth.GenerateHandle calls rand.Read, which eventually calls x509.Certificate.Verify

linksmith.main calls http.ListenAndServe, which eventually calls net.Listen

auth.AuthService.GenerateOTP calls fmt.Sprintf, which eventually calls x509.HostnameError.Error

auth.GenerateHandle calls rand.Read, which eventually calls x509.Certificate.VerifyHostname

auth.GenerateHandle calls rand.Read, which eventually calls x509.Certificate.Verify

linksmith.main calls http.ListenAndServe, which eventually calls textproto.Reader.ReadMIMEHeader

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-go@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/