feat: add compositor capability

programs/src/capabilities/main.cpp

@@ -60,6 +60,7 @@ static const char* const kCapDescriptions[CAP_COUNT] = {
     "Manage hardware devices (Bluetooth, radio)",
     "Read the kernel log",
     "Write to 0:/os and 0:/apps (never part of \"all\")",
+    "Read and send input to other windows (never part of \"all\")",
 };
 
 // ==== Grant table model ====