Refactor metrics into its own module

examples/get_started/quickstart.py

@@ -53,7 +53,7 @@
 import spikeinterface.preprocessing as spre
 import spikeinterface.sorters as ss
 import spikeinterface.postprocessing as spost
-import spikeinterface.qualitymetrics as sqm
+import spikeinterface.metrics as sqm
 import spikeinterface.comparison as sc
 import spikeinterface.exporters as sexp
 import spikeinterface.curation as scur

examples/tutorials/qualitymetrics/plot_3_quality_metrics.py

@@ -8,7 +8,7 @@
 """
 
 import spikeinterface.core as si
-from spikeinterface.qualitymetrics import (
+from spikeinterface.metrics import (
     compute_snrs,
     compute_firing_rates,
     compute_isi_violations,

examples/tutorials/qualitymetrics/plot_4_curation.py

@@ -12,7 +12,7 @@
 
 import spikeinterface.core as si
 
-from spikeinterface.qualitymetrics import compute_quality_metrics
+from spikeinterface.metrics import compute_quality_metrics
 
 
 ##############################################################################