Translation cleanups

A number of cleanups and disentanglements to the current translator implementations:

• Extract a real abstract Translator interface
• Remove the mapping based approach from the FloatTranslator to make it actually accept floating point values unequal exact integers

saqc/core/translation/basescheme.py

@@ -24,6 +24,7 @@ BackwardMap = Dict[float, ExternalFlag]
 
 
 class TranslationScheme:
+
     @abstractproperty
     def DFILTER_DEFAULT(self):
         pass
@@ -33,15 +34,11 @@ class TranslationScheme:
         pass
 
     @abstractmethod
-    def forward(self, user_flags: pd.DataFrame | DictOfSeries) -> Flags:
+    def forward(self, flags: pd.DataFrame | DictOfSeries) -> Flags:
         pass
 
     @abstractmethod
-    def backward(
-        self,
-        internal_flags: Flags,
-        attrs: dict | None = None,
-    ) -> DictOfSeries:
+    def backward(self, flags: Flags, attrs: dict | None = None) -> DictOfSeries:
         pass