feat: support to selection/exclusion files by extension

Author: Daniele Briggi

action.yaml

@@ -15,7 +15,15 @@ inputs:
   source_files:
     description: The path of the files, by default it will parse every file recursively starting from the working directory.
     required: false
-    default: $(pwd)
+    default: "./"
+  only_extensions:
+    description: Comma-separated list of file extensions to include (e.g., "md,txt,html"). If not set, all supported file types are included.
+    required: false
+    default: ""
+  exclude_extensions:
+    description: Comma-separated list of file extensions to exclude (e.g., "js,jsx"). If not set, no file types are excluded.
+    required: false
+    default: ""
   hf_model_id: 
     description: The Hugging Face model ID to use for generating embeddings.
     required: false
@@ -79,7 +87,9 @@ runs:
         sqlite-rag add \
           --recursive "${{ inputs.source_files }}" \
           --metadata '{"base_url": "${{ inputs.base_url }}"}' \
-          --relative-paths
+          --relative-paths \
+          --only "${{ inputs.only_extensions }}" \
+          --exclude "${{ inputs.exclude_extensions }}"
       shell: bash
 
     - name: Upload the database to SQLite Cloud