Add speculative decoding example (#55)

Also fix the structured response example docstring,
and mark all example scripts as executable.

Author: ncoghlan

examples/speculative-decoding.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+"""Example script demonstrating speculative decoding."""
+
+import lmstudio as lms
+
+main_model_key = "qwen2.5-7b-instruct-1m"
+draft_model_key = "qwen2.5-0.5b-instruct"
+
+model = lms.llm(main_model_key)
+result = model.respond(
+    "What are the prime numbers between 0 and 100?",
+    config={
+        "draftModel": draft_model_key,
+    }
+)
+
+print(result)
+stats = result.stats
+print(f"Accepted {stats.accepted_draft_tokens_count}/{stats.predicted_tokens_count} tokens")

examples/structured-response.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-"""Example script demonstrating an interactive LLM chatbot."""
+"""Example script demonstrating structured responses."""
 
 import json