feat: add inherited sessions and desktop session teardown

template/docs/syscalls.md

@@ -36,6 +36,8 @@ int      spawn(const char* path, const char* args);   // Spawn child, inheriting
 int      waitpid(int pid);                            // Wait for process to exit
 int      kill(int pid);                               // Kill a process
 int      proclist(ProcInfo* buf, int max);             // List all processes (returns count)
+int      setsession();                                // Start a new inherited process session
+int      killsession(int sessionId);                  // Kill live members; repeat until zero
 ```
 
 **`ProcInfo` struct:**