[Feature]: Enhance text placement in relation to edges

[chrisreddington]

Description

Currently, the text rendering in gh-skyline places the text a little arbitrarily within the rendered elements. We want to improve this by placing the username and the year at a certain distance from their respective (left and right) edges

Requirements

• Modify the text rendering logic to place the username a specified distance from the left edge.
• Place the year the same specified distance from the right edge.
• Ensure the distance is configurable through the textRenderConfig struct.
• Update any relevant documentation to reflect these changes.
• Write unit tests to verify the new text placement

Definition of Done

• The username is placed a specified distance from the left edge.
• The year is placed the same specified distance from the right edge.
• The distance is configurable via textRenderConfig.
• Relevant documentation is updated.
• Unit tests are updated/written and passing.

Additional Notes

• Follow standard Go conventions and best practices.
• Use clear, descriptive variable and function names.
• Add comments to explain complex logic or non-obvious implementations.
• Include GoDoc comments for all changes.

This issue is a great opportunity for new contributors to get familiar with the codebase and make a meaningful improvement. If you have any questions, feel free to ask!