Add french, italian, portuguese, spanish, german (#155)

The french 6 layers variant wasn't included because it's not good enough
yet. Use the `french_24l` variant for now.

pocket_tts/models/mimi.py

@@ -22,6 +22,8 @@ class MimiModel(nn.Module):
         encoder_frame_rate: float,
         sample_rate: int,
         channels: int,
+        inner_dim: int | None,
+        outer_dim: int | None,
         encoder_transformer: ProjectedTransformer,
         decoder_transformer: ProjectedTransformer,
     ):
@@ -50,8 +52,14 @@ class MimiModel(nn.Module):
             assert downsample_stride == int(downsample_stride), (
                 f"Only integer strides are supported, got {downsample_stride}"
             )
-            self.downsample = ConvDownsample1d(int(downsample_stride), dimension=dimension)
-            self.upsample = ConvTrUpsample1d(int(downsample_stride), dimension=dimension)
+
+            # v2 of models
+            self.downsample = ConvDownsample1d(
+                int(downsample_stride), dimension=dimension, out_dimension=inner_dim
+            )
+            self.upsample = ConvTrUpsample1d(
+                int(downsample_stride), dimension=dimension, in_dimension=outer_dim
+            )
 
     @property
     def frame_size(self) -> int: