chore: add simple operation and type examples

examples/01_simple_type_checking/01_simple_operations.py

@@ -0,0 +1,4 @@
+a: int = 3
+b: int = 4
+
+c = a + b  # -> int

examples/01_simple_type_checking/02_simple_types.midas

@@ -0,0 +1,14 @@
+type Meter(float)
+type Second(float)
+type MeterPerSecond(float)
+
+extend Meter {
+    op __add__(Meter) -> Meter
+    op __sub__(Meter) -> Meter
+    op __truediv__(Second) -> MeterPerSecond
+}
+
+extend Second {
+    op __add__(Second) -> Second
+    op __sub__(Second) -> Second
+}

examples/01_simple_type_checking/02_simple_types.py

@@ -0,0 +1,8 @@
+# type: ignore
+# ruff: disable [F821]
+
+midas.using("02_simple_types.midas")
+
+distance: Meter = 123.45
+time: Second = 6.7
+speed = distance / time