Desktop integration (#2073)

* Open stash in system tray on Windows/MacOS
* Add desktop notifications
* MacOS Bundling
* Add binary icon

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

vendor/github.com/apenwarr/w32/alpc_constants.go

@@ -0,0 +1,64 @@
+package w32
+
+const (
+	ALPC_PORFLG_ALLOW_LPC_REQUESTS = 0x20000
+	ALPC_PORFLG_SYSTEM_PROCESS     = 0x100000
+	ALPC_PORFLG_WAITABLE_PORT      = 0x40000
+)
+
+const (
+	ALPC_MSGFLG_REPLY_MESSAGE   = 0x1
+	ALPC_MSGFLG_LPC_MODE        = 0x2     // ?
+	ALPC_MSGFLG_RELEASE_MESSAGE = 0x10000 // dbg
+	ALPC_MSGFLG_SYNC_REQUEST    = 0x20000 // dbg
+	ALPC_MSGFLG_WAIT_USER_MODE  = 0x100000
+	ALPC_MSGFLG_WAIT_ALERTABLE  = 0x200000
+	ALPC_MSGFLG_WOW64_CALL      = 0x80000000 // dbg
+)
+const (
+	ALPC_MESSAGE_SECURITY_ATTRIBUTE = 0x80000000
+	ALPC_MESSAGE_VIEW_ATTRIBUTE     = 0x40000000
+	ALPC_MESSAGE_CONTEXT_ATTRIBUTE  = 0x20000000
+	ALPC_MESSAGE_HANDLE_ATTRIBUTE   = 0x10000000
+)
+
+const (
+	OBJ_INHERIT          = 0x00000002
+	OBJ_PERMANENT        = 0x00000010
+	OBJ_EXCLUSIVE        = 0x00000020
+	OBJ_CASE_INSENSITIVE = 0x00000040
+	OBJ_OPENIF           = 0x00000080
+	OBJ_OPENLINK         = 0x00000100
+	OBJ_KERNEL_HANDLE    = 0x00000200
+)
+
+const (
+	LPC_REQUEST               = 1
+	LPC_REPLY                 = 2
+	LPC_DATAGRAM              = 3
+	LPC_LOST_REPLY            = 4
+	LPC_PORT_CLOSED           = 5
+	LPC_CLIENT_DIED           = 6
+	LPC_EXCEPTION             = 7
+	LPC_DEBUG_EVENT           = 8
+	LPC_ERROR_EVENT           = 9
+	LPC_CONNECTION_REQUEST    = 10
+	LPC_CONTINUATION_REQUIRED = 0x2000
+)
+
+const (
+	SecurityAnonymous      uint32 = 1
+	SecurityIdentification uint32 = 2
+	SecurityImpersonation  uint32 = 3
+	SecurityDelegation     uint32 = 4
+)
+
+const (
+	SECURITY_DYNAMIC_TRACKING byte = 1
+	SECURITY_STATIC_TRACKING  byte = 0
+)
+
+const (
+	ALPC_SYNC_OBJECT_TYPE   uint32 = 2
+	ALPC_THREAD_OBJECT_TYPE uint32 = 4
+)