build: format codebase imports using ruff linter (#1028)

# What does this PR do?

- Configured ruff linter to automatically fix import sorting issues.
- Set --exit-non-zero-on-fix to ensure non-zero exit code when fixes are
applied.
- Enabled the 'I' selection to focus on import-related linting rules.
- Ran the linter, and formatted all codebase imports accordingly.
- Removed the black dep from the "dev" group since we use ruff

Signed-off-by: Sébastien Han <seb@redhat.com>

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]

[//]: # (## Documentation)
[//]: # (- [ ] Added a Changelog entry if the change is significant)

Signed-off-by: Sébastien Han <seb@redhat.com>

llama_stack/cli/download.py

@@ -16,11 +16,9 @@ from pathlib import Path
 from typing import Dict, List, Optional
 
 import httpx
-
 from llama_models.datatypes import Model
 from llama_models.sku_list import LlamaDownloadInfo
 from pydantic import BaseModel, ConfigDict
-
 from rich.console import Console
 from rich.progress import (
     BarColumn,

llama_stack/cli/model/describe.py

@@ -8,7 +8,6 @@ import argparse
 import json
 
 from llama_models.sku_list import resolve_model
-
 from termcolor import colored
 
 from llama_stack.cli.subcommand import Subcommand

llama_stack/cli/model/model.py

@@ -11,7 +11,6 @@ from llama_stack.cli.model.download import ModelDownload
 from llama_stack.cli.model.list import ModelList
 from llama_stack.cli.model.prompt_format import ModelPromptFormat
 from llama_stack.cli.model.verify_download import ModelVerifyDownload
-
 from llama_stack.cli.subcommand import Subcommand
 
 

llama_stack/cli/model/prompt_format.py

@@ -8,7 +8,7 @@ import argparse
 import textwrap
 from io import StringIO
 
-from llama_models.datatypes import CoreModelId, is_multimodal, model_family, ModelFamily
+from llama_models.datatypes import CoreModelId, ModelFamily, is_multimodal, model_family
 
 from llama_stack.cli.subcommand import Subcommand
 

llama_stack/cli/model/safety_models.py

@@ -9,7 +9,6 @@ from typing import Any, Dict, Optional
 from llama_models.datatypes import CheckpointQuantizationFormat
 from llama_models.llama3.api.datatypes import SamplingParams
 from llama_models.sku_list import LlamaDownloadInfo
-
 from pydantic import BaseModel, ConfigDict, Field
 
 

llama_stack/cli/stack/_build.py

@@ -21,12 +21,11 @@ from prompt_toolkit.validation import Validator
 from termcolor import cprint
 
 from llama_stack.cli.table import print_table
-
 from llama_stack.distribution.build import (
+    SERVER_DEPENDENCIES,
+    ImageType,
     build_image,
     get_provider_dependencies,
-    ImageType,
-    SERVER_DEPENDENCIES,
 )
 from llama_stack.distribution.datatypes import (
     BuildConfig,

llama_stack/cli/tests/test_stack_config.py

@@ -8,6 +8,7 @@ from datetime import datetime
 
 import pytest
 import yaml
+
 from llama_stack.distribution.configure import (
     LLAMA_STACK_RUN_CONFIG_VERSION,
     parse_and_maybe_upgrade_config,