🔧 Add Configuration File Support (JSON/YAML)

## Description
Allow users to save their preferences and configurations in a config file instead of passing command-line arguments every time.

## Tasks
- [ ] Design configuration file structure
- [ ] Implement config file parser (JSON or YAML)
- [ ] Add --config flag to load settings
- [ ] Create default config template
- [ ] Document configuration options

## Expected Outcome
Users can save and reuse configurations easily.

## Skills Required
- Python programming
- JSON/YAML parsing
- File I/O operations

## Difficulty Level
🟡 Intermediate

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*Hacktoberfest 2025 - Feature enhancement*

Start at the CLI's existing command-line argument handling and trace how preferences are currently passed into the tool. Define the JSON/YAML structure, implement the --config loading path and default template, then document the available options; done means users can save and reuse configurations instead of repeating arguments.

Written by the indexing model from the issue text.