feat(examples): add streaming .ds examples — compiler-native streaming

- streaming-counter.ds: reactive counter with 'stream counter on ws://...'
- streaming-receiver.ds: remote receiver with 'stream from ws://...'
- E2E verified: compiles to streaming JS, connects to relay, sends signal diffs

examples/streaming-counter.ds

@@ -0,0 +1,26 @@
+-- DreamStack Streaming Counter
+-- A reactive counter that streams all signal changes
+-- to remote receivers via the bitstream relay.
+--
+-- Run with:
+--   cargo run -p ds-stream &
+--   dreamstack stream examples/streaming-counter.ds
+
+let count = 0
+let doubled = count * 2
+let message = "Streaming Counter"
+
+stream counter on "ws://localhost:9100" { mode: signal }
+
+view counter =
+  column [
+    text message
+    text count
+    text doubled
+    row [
+      button "-" { click: count -= 1 }
+      button "+" { click: count += 1 }
+    ]
+    when count > 10 ->
+      text "On fire!"
+  ]

examples/streaming-receiver.ds

@@ -0,0 +1,15 @@
+-- DreamStack Streaming Receiver
+-- Connects to a remote stream and renders the received signal state.
+--
+-- Run with:
+--   (source must be running first)
+--   dreamstack dev examples/streaming-receiver.ds --port 3001
+
+let remote = stream from "ws://localhost:9100"
+
+view main =
+  column [
+    text "📡 Remote Stream"
+    text "Count: {remote.count}"
+    text "Doubled: {remote.doubled}"
+  ]