Add resistance_sampler interface for config validation (#5718)

esphome/components/resistance_sampler/__init__.py

@@ -0,0 +1,6 @@
+import esphome.codegen as cg
+
+resistance_sampler_ns = cg.esphome_ns.namespace("resistance_sampler")
+ResistanceSampler = resistance_sampler_ns.class_("ResistanceSampler")
+
+CODEOWNERS = ["@jesserockz"]

esphome/components/resistance_sampler/resistance_sampler.h

@@ -0,0 +1,10 @@
+#pragma once
+
+namespace esphome {
+namespace resistance_sampler {
+
+/// Abstract interface to mark components that provide resistance values.
+class ResistanceSampler {};
+
+}  // namespace resistance_sampler
+}  // namespace esphome