doc: add basic usage example and installation guide to README.md

README.md

@@ -6,6 +6,59 @@ Async Yandex Tracker Client based on aiohttp and pydantic (v2)
 [![Code linter: ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v1.json)](https://github.com/charliermarsh/ruff)
 [![Linters](https://github.com/danfimov/ya_tracker_client/actions/workflows/code-check.yml/badge.svg)](https://github.com/danfimov/ya_tracker_client/actions/workflows/code-check.yml)
 
+---
+
+API docs: https://cloud.yandex.com/en/docs/tracker/about-api
+
+## Installation
+
+```shell
+pip install ya_tracker_clint
+```
+
+## Usage
+
+```python
+import os
+from asyncio import run
+
+from dotenv import load_dotenv
+
+from ya_tracker_client import YaTrackerClient
+
+
+load_dotenv()
+# from registered application at Yandex OAuth - https://oauth.yandex.ru/
+API_TOKEN = os.getenv("API_TOKEN")
+# from admin panel at Yandex Tracker - https://tracker.yandex.ru/admin/orgs
+API_ORGANISATION_ID = os.getenv("API_ORGANISATION_ID")
+
+
+async def main() -> None:
+    # init client
+    client = YaTrackerClient(
+        organisation_id=API_ORGANISATION_ID,
+        oauth_token=API_TOKEN,
+    )
+
+    # create issue
+    new_issue = await client.create_issue('New issue', 'TRACKER-QUEUE')
+
+     # get issue
+    issue = await client.get_issue('KEY-1')
+
+    # update issue (just pass kwargs)
+    issue = await client.edit_issue('KEY-1', description='Hello World')
+
+    # don't forget to close tracker on app shutdown
+    await client.stop()
+
+
+if __name__ == "__main__":
+    run(main())
+```
+
+
 ## Explanations about naming
 
 - All `self` properties renamed to `url` cause it's incompatible with Python;