Update README with library generation workflow

Added basic workflow instructions for library generation and loading.

Author: florian-huber

README.md

@@ -3,3 +3,27 @@
 
 # MS2Query 2.0
 more to come...
+
+## Basic workflow (so far):
+
+### Library generation
+```python
+from ms2query.create_new_library import create_new_library
+
+ms2query_lib = create_new_library(
+    spectra_files=["spectra.mgf"],
+    annotation_files=[],
+    output_folder="my_ms2query_folder/",
+    model_path="models/ms2deepscore.pt"
+)
+```
+
+### Loading already generated library
+```python
+from ms2query.create_new_library import load_created_library
+
+lib = load_created_library("my_ms2query_folder/")
+```
+
+
+