feat: add support for local expressions in ADExpressionContext and update smart condition handling

unit_tests/test_template.yaml

@@ -23,6 +23,10 @@ templates_library:
     trigger_conditions: binary_sensor.off == False
     blocking_conditions:
       - binary_sensor.on
+  T4:
+    local_expressions:
+      local_threshold: "binary_sensor.true ? 170 : 200"
+    trigger_conditions: sensor.int170 == local_threshold
 
 tests:
   test_1: 
@@ -44,3 +48,25 @@ tests:
     conditions: 
       template_conditions: <T2>,<T3>
       trigger_conditions: binary_sensor.true and binary_sensor.false
+
+  # local_expressions in a template
+  test_5_local_expr_in_template_true:
+    expected_result: Succeeded
+    conditions:
+      template_conditions: <T4>
+
+  # local_expressions declared directly in conditions block
+  test_6_local_expr_inline_true:
+    expected_result: Succeeded
+    conditions:
+      local_expressions:
+        my_threshold: "binary_sensor.true ? 17 : 200"
+      trigger_conditions: sensor.int17 == my_threshold
+
+  # local_expressions inline, condition not met
+  test_7_local_expr_inline_false:
+    expected_result: Failed
+    conditions:
+      local_expressions:
+        my_threshold: "binary_sensor.false ? 17 : 200"
+      trigger_conditions: sensor.int17 == my_threshold