feat: Adding OpenAI Compatible Prompts API

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

tests/unit/providers/prompts/conftest.py

@@ -0,0 +1,45 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import os
+import tempfile
+
+import pytest
+
+from llama_stack.core.prompts.prompts import PromptServiceConfig, PromptServiceImpl
+from llama_stack.providers.utils.kvstore.config import SqliteKVStoreConfig
+
+
+@pytest.fixture
+async def temp_prompt_store():
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".db") as tmp_file:
+        db_path = tmp_file.name
+
+    try:
+        config = PromptServiceConfig(kvstore=SqliteKVStoreConfig(db_path=db_path))
+        store = PromptServiceImpl(config, deps={})
+        await store.initialize()
+        yield store
+    finally:
+        if os.path.exists(db_path):
+            os.unlink(db_path)
+
+
+@pytest.fixture
+def sample_prompt_data():
+    return {
+        "prompt": "Hello {{name}}, welcome to {{platform}}!",
+        "variables": {"name": "John", "platform": "LlamaStack"},
+    }
+
+
+@pytest.fixture
+def sample_prompts_data():
+    return [
+        {"prompt": "Hello {{name}}!", "variables": {"name": "Alice"}},
+        {"prompt": "Welcome to {{platform}}, {{user}}!", "variables": {"platform": "LlamaStack", "user": "Bob"}},
+        {"prompt": "Your order {{order_id}} is ready for pickup.", "variables": {"order_id": "12345"}},
+    ]