Add continuous option to the graph (#6093)

Co-authored-by: Samuel Sieb <samuel@sieb.net>

esphome/components/graph/__init__.py

@@ -61,6 +61,7 @@ VALUE_POSITION_TYPE = {
     "BELOW": ValuePositionType.VALUE_POSITION_TYPE_BELOW,
 }
 
+CONF_CONTINUOUS = "continuous"
 
 GRAPH_TRACE_SCHEMA = cv.Schema(
     {
@@ -70,6 +71,7 @@ GRAPH_TRACE_SCHEMA = cv.Schema(
         cv.Optional(CONF_LINE_THICKNESS): cv.positive_int,
         cv.Optional(CONF_LINE_TYPE): cv.enum(LINE_TYPE, upper=True),
         cv.Optional(CONF_COLOR): cv.use_id(color.ColorStruct),
+        cv.Optional(CONF_CONTINUOUS): cv.boolean,
     }
 )
 
@@ -186,6 +188,8 @@ async def to_code(config):
         if CONF_COLOR in trace:
             c = await cg.get_variable(trace[CONF_COLOR])
             cg.add(tr.set_line_color(c))
+        if CONF_CONTINUOUS in trace:
+            cg.add(tr.set_continuous(trace[CONF_CONTINUOUS]))
         cg.add(var.add_trace(tr))
     # Add legend
     if CONF_LEGEND in config: