feat: enhance matplotlib type defs

crates/erg_compiler/lib/external/matplotlib.d/__init__.d.er

@@ -1 +1,4 @@
 .pyplot = pyimport "./pyplot"
+.scale = pyimport "./scale"
+
+.use!: Str => NoneType

crates/erg_compiler/lib/external/matplotlib.d/axes.d/__init__.d.er

@@ -0,0 +1,3 @@
+._axes = pyimport "./_axes"
+
+.Axes! = ._axes.Axes!

crates/erg_compiler/lib/external/matplotlib.d/axes.d/_axes.d.er

@@ -0,0 +1,21 @@
+.Axes!: ClassType
+.Axes!.
+    scatter!: (
+        self: RefMut(.Axes!),
+        x: Num, # TODO: Float | ArrayLike
+        y: Num,
+        s := Num,
+        c := Iterable(Int),
+        vmin := Float,
+        vmax := Float,
+    ) => NoneType
+    set!: (
+        self: RefMut(.Axes!),
+        xlabel := Str,
+        xlim := (Float, Float),
+        xticks := Iterable(Obj),
+        ylabel := Str,
+        ylim := (Float, Float),
+        yticks := Iterable(Obj),
+        title := Str
+    ) => NoneType

crates/erg_compiler/lib/external/matplotlib.d/figure.d.er

@@ -0,0 +1 @@
+.Figure: ClassType

crates/erg_compiler/lib/external/matplotlib.d/pyplot.d/__init__.d.er

@@ -1,6 +1,9 @@
 # lines = pyimport "../lines"
 text = pyimport "../text"
 legend = pyimport "../legend"
+.style = pyimport "../style"
+figure = pyimport "../figure"
+axes = pyimport "../axes"
 
 .plot!: (*args: Obj, scaleX := Bool, scaleY := Bool) => [Obj; _]
 .show!: () => NoneType
@@ -8,3 +11,8 @@ legend = pyimport "../legend"
 .xlabel!: (label: Str) => text.Text
 .ylabel!: (label: Str) => text.Text
 .legend!: (labels := [Str; _]) => legend.Legend
+.subplots!: (() => (figure.Figure, axes.Axes!)) \
+    and ((nrows: {1}, ncols: {1}) => (figure.Figure, axes.Axes!)) \
+    and ((nrows: {1}, ncols: Nat) => (figure.Figure, [axes.Axes!; _])) \
+    and ((nrows: Nat, ncols: {1}) => (figure.Figure, [axes.Axes!; _])) \
+    and ((nrows: Nat, ncols: Nat) => (figure.Figure, [[axes.Axes!; _]; _]))

crates/erg_compiler/lib/external/matplotlib.d/style.d/__init__.d.er

@@ -0,0 +1 @@
+.use!: Str => NoneType

crates/erg_compiler/lib/external/numpy.d/__init__.d.er

@@ -1,5 +1,6 @@
 # TODO: dependent (static shaped)
 .NDArray = 'ndarray': ClassType
+.NDArray <: Iterable Obj
 .NDArray <: Num
 .NDArray.
     shape: [Nat; _]