fix: improve log system and doc

[Majorfi]

Working on fixing logs, see #34

[Copilot]

Pull Request Overview

This PR improves the logging system and documentation by adding file logging support, deprecating the unused utils/logs.go module, enhancing log configuration, and updating documentation to reflect these changes.

• Added dual output logging (stdout + file) with graceful fallback when file writing fails
• Added a new helper function GetDir for extracting directory paths from file paths
• Improved log verbosity controls with startup configuration summaries and reduced noise in reset operations

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pkg/utils/logs.go	Added deprecation notice for unused logging module
pkg/utils/helper.go	Added GetDir function for file path directory extraction
pkg/immich/client.go	Improved logging for stack reset operations with better verbosity control
docs/integration/docker.md	Updated documentation to clarify file logging configuration
docs/integration/docker-compose.md	Enhanced documentation with logging configuration examples
docs/getting-started/quick-start.md	Added file logging examples to quick start guide
docs/api-reference/environment-variables.md	Expanded logging documentation with file logging details
docker-compose.yml	Updated comments to clarify logging configuration
cmd/config_test.go	Added comprehensive tests for logging configuration
cmd/config.go	Implemented file logging support and startup configuration summary
README.md	Added logging examples and clarifications

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