lsp: Mark deprecation warnings

Some editors use different styling (e.g. strikethrough) for deprecation
warnings.

blueprintcompiler/language/common.py

@@ -33,6 +33,7 @@ from ..errors import (
     CodeAction,
     CompileError,
     CompileWarning,
+    DeprecatedWarning,
     MultipleErrors,
     UpgradeWarning,
 )

blueprintcompiler/language/gobject_property.py

@@ -99,7 +99,7 @@ class Property(AstNode):
             hints = []
             if self.gir_property.deprecated_doc:
                 hints.append(self.gir_property.deprecated_doc)
-            raise CompileWarning(
+            raise DeprecatedWarning(
                 f"{self.gir_property.signature} is deprecated",
                 hints=hints,
             )

blueprintcompiler/language/gobject_signal.py

@@ -142,7 +142,7 @@ class Signal(AstNode):
             hints = []
             if self.gir_signal.deprecated_doc:
                 hints.append(self.gir_signal.deprecated_doc)
-            raise CompileWarning(
+            raise DeprecatedWarning(
                 f"{self.gir_signal.signature} is deprecated",
                 hints=hints,
             )

blueprintcompiler/language/types.py

@@ -63,7 +63,7 @@ class TypeName(AstNode):
             hints = []
             if self.gir_type.deprecated_doc:
                 hints.append(self.gir_type.deprecated_doc)
-            raise CompileWarning(
+            raise DeprecatedWarning(
                 f"{self.gir_type.full_name} is deprecated",
                 hints=hints,
             )