fix: add support for application/json-seq & application/x-ndjson

[st3v3nmw]

Allows us to properly parse application/json-seq returned by the logs endpoint:

>>> snap_http.logs(names=["juju", "microk8s"], entries=10)
SnapdResponse(
  type='sync',
  status_code=200,
  status='OK',
  result=[
    {'timestamp': '2026-03-25T04:57:10.745835Z', 'message': 'snap.microk8s.daemon-apiserver-kicker.service: Start request repeated too quickly.', 'sid': 'systemd', 'pid': '1'},
    {'timestamp': '2026-03-25T04:57:10.749812Z', 'message': "snap.microk8s.daemon-apiserver-kicker.service: Failed with result 'exit-code'.", 'sid': 'systemd', 'pid': '1'},
    {'timestamp': '2026-03-25T04:57:10.749899Z', 'message': 'Failed to start snap.microk8s.daemon-apiserver-kicker.service - Service for snap application microk8s.daemon-apiserver-kicker.', 'sid': 'systemd', 'pid': '1'},
    {'timestamp': '2026-03-25T05:00:28.038837Z', 'message': 'I0325 08:00:28.038774 2105402 cidrallocator.go:277] updated ClusterIP allocator for Service CIDR 10.152.183.0/24', 'sid': 'microk8s.daemon-kubelite', 'pid': '2105402'},
    {'timestamp': '2026-03-25T05:10:28.039087Z', 'message': 'I0325 08:10:28.039049 2105402 cidrallocator.go:277] updated ClusterIP allocator for Service CIDR 10.152.183.0/24', 'sid': 'microk8s.daemon-kubelite', 'pid': '2105402'},
    {'timestamp': '2026-03-25T05:20:28.040078Z', 'message': 'I0325 08:20:28.040022 2105402 cidrallocator.go:277] updated ClusterIP allocator for Service CIDR 10.152.183.0/24', 'sid': 'microk8s.daemon-kubelite', 'pid': '2105402'},
    {'timestamp': '2026-03-25T05:30:28.040194Z', 'message': 'I0325 08:30:28.040166 2105402 cidrallocator.go:277] updated ClusterIP allocator for Service CIDR 10.152.183.0/24', 'sid': 'microk8s.daemon-kubelite', 'pid': '2105402'},
    {'timestamp': '2026-03-25T05:40:28.042441Z', 'message': 'I0325 08:40:28.042391 2105402 cidrallocator.go:277] updated ClusterIP allocator for Service CIDR 10.152.183.0/24', 'sid': 'microk8s.daemon-kubelite', 'pid': '2105402'},
    {'timestamp': '2026-03-25T05:50:28.043351Z', 'message': 'I0325 08:50:28.043318 2105402 cidrallocator.go:277] updated ClusterIP allocator for Service CIDR 10.152.183.0/24', 'sid': 'microk8s.daemon-kubelite', 'pid': '2105402'},
    {'timestamp': '2026-03-25T06:00:28.044017Z', 'message': 'I0325 09:00:28.043986 2105402 cidrallocator.go:277] updated ClusterIP allocator for Service CIDR 10.152.183.0/24', 'sid': 'microk8s.daemon-kubelite', 'pid': '2105402'}
  ], 
  sources=None,
  change=None,
  warning_timestamp=None,
  warning_count=None
)

Closes #41

Follow up on #40