Add MetadataEngine and ShortsMetadataEngine classes

src/engines/MetadataEngine/BaseMetadataEngine.py

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+from abc import abstractmethod
+from typing import TypedDict
+
+from .. import BaseEngine
+
+class MetadataEngineSettings(TypedDict):
+    title: str
+    description: str
+
+class BaseMetadataEngine(BaseEngine):
+    def __init__(self, **kwargs) -> None:
+        ...
+
+    @abstractmethod
+    def get_metadata(self, input: str) -> MetadataEngineSettings:
+        ...

src/engines/MetadataEngine/ShortsMetadataEngine.py

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+from . import BaseMetadataEngine
+
+from ...utils.prompting import get_prompt
+
+class ShortsMetadataEngine(BaseMetadataEngine):
+    def __init__(self, **kwargs) -> None:
+        ...
+
+    def get_metadata(self):
+        sytsem_prompt, chat_prompt = get_prompt("ShortsMetadata", by_file_location=__file__)
+        chat_prompt = chat_prompt.replace("{script}", self.ctx.script)
+
+        return self.ctx.simplellmengine.generate(chat_prompt=chat_prompt, system_prompt=sytsem_prompt, json_mode=True)
+
+    def get_options(self):
+        return []

src/engines/MetadataEngine/__init__.py

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+from .BaseMetadataEngine import BaseMetadataEngine
+from .ShortsMetadataEngine import ShortsMetadataEngine

src/engines/MetadataEngine/prompts/ShortsMetadata.yaml

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+system: |-
+  You will be recieving from the user a youtube shorts video script.
+  Your goal is to write a very short title and description for the video.
+
+  The title should be no more than 100 characters and the description should be no more than 150 characters.
+
+  In the title, include one emogi related to the content of the video or to the general theme or mood of the video.
+  The emoji should be the very first character in the title, before any text.
+  Include NO hashtags in the title.
+  Include 3-5 relevant hashtags in the description. Do not repeat yourself and do not use specific hashtags. Use generic hastag or else they won't be relevant.
+  Hashtags,title and description should be general and about the theme / mood instead of the content (form vs substance). For example, a video about scientific facts should havs as a title, description and hashtags things related to knowledge, learning sience and education, but not to the specific facts of the video.
+
+  Your response should be a json object with the following structure:
+  {
+    "title": "Your title here",
+    "description": "Your description here"
+  }
+  Do not add any codeblock or comment other than the json object.
+chat: |-
+  {script}