PyDoc: use Python's type annotation syntax for doc-strings

Replace plain-text type information with the type syntax used
for Python's type annotations as it's more concise, especially for
callbacks which often didn't include useful type information.

Note that this change only applies to inline doc-strings,
generated doc-strings from RNA need to be updated separately.

Details:

- Many minor corrections were made when "list" was incorrectly used
  instead of "sequence".
- Some type information wasn't defined in the doc-strings and has been
  added.
- Verbose type info would benefit from support for type aliases.

source/blender/python/gpu/gpu_py_matrix.cc

@@ -370,8 +370,8 @@ PyDoc_STRVAR(
     "\n"
     "   Scale the current stack matrix.\n"
     "\n"
-    "   :arg scale: Scale the current stack matrix.\n"
-    "   :type scale: sequence of 2 or 3 floats\n");
+    "   :arg scale: Scale the current stack matrix with 2 or 3 floats.\n"
+    "   :type scale: Sequence[float]\n");
 static PyObject *pygpu_matrix_scale(PyObject * /*self*/, PyObject *value)
 {
   BPYGPU_IS_INIT_OR_ERROR_OBJ;
@@ -419,8 +419,8 @@ PyDoc_STRVAR(
     "\n"
     "   Scale the current stack matrix.\n"
     "\n"
-    "   :arg offset: Translate the current stack matrix.\n"
-    "   :type offset: sequence of 2 or 3 floats\n");
+    "   :arg offset: Translate the current stack matrix with 2 or 3 floats.\n"
+    "   :type offset: Sequence[float]\n");
 static PyObject *pygpu_matrix_translate(PyObject * /*self*/, PyObject *value)
 {
   float offset[3];