Add demo script to README

Author: thomasantony

README.md

@@ -40,6 +40,41 @@ The package installs the command line entry point `llamacpp-cli` that points to
 
 See `llamacpp/cli.py` for a detailed example. The simplest demo would be something like the following:
 
+```python
+
+params = llamacpp.gpt_params(
+	'./models/7B/ggml_model_q4_0.bin', # model,
+	"A llama is a ", # prompt
+	"", # reverse_prompt
+	512, # ctx_size
+	100, # n_predict
+	40, # top_k
+	0.95, # top_p
+	0.85, # temp
+	1.30, # repeat_penalty
+	-1, # seed
+	8, # threads
+	64, # repeat_last_n
+	8, # batch_size
+	False, # color
+	False, # interactive or args.interactive_start
+	False, # interactive_start
+)
+model = llamacpp.PyLLAMA(params)
+model.add_bos()		# Adds "beginning of string" token
+model.update_input(params.prompt)
+model.print_startup_stats()
+model.prepare_context()
+
+model.ingest_all_pending_input(True)
+while not model.is_finished():
+	model.ingest_all_pending_input(not input_noecho)
+	text, is_finished = model.infer_text()
+	print(text, end="")
+if is_finished:
+	break
+```
+
 ## ToDo
 
 - [x] Use poetry to build package