Initial Navis client with NaiveProxy, profiles, ping and git updates

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/protocols/naive/sys_other.go

@@ -0,0 +1,7 @@
+//go:build !windows
+
+package naive
+
+import "os/exec"
+
+func applySysProcAttr(cmd *exec.Cmd) {}