[WIP] [Config] Detect/Copy/Download config.yml from config.yml.template

[YozoraXCII]

Description

This PR adds logic to the finding of config.yml as follows:

If config.yml is found in the config folder, run will continue as normal.

If config.yml is not found in the config folder but config.yml.template is, copy and rename the file:

Configuration file (config.yml) created at C:\Users\Yozora\Documents\Repositories\Kometa\config\config.yml. Please open this file and update it with your API keys and other required settings.

If config.yml is not found in the config folder and config.yml.template cannot be found, determine the user's branch and download/rename the config.yml.template file from GitHub:

A Configuration file (config.yml) has been downloaded from GitHub and saved as C:\Users\Yozora\Documents\Repositories\Kometa\config\config.yml. Please update this file with your API keys and other required settings.

If config.yml is not found in the config folder and config.yml.template cannot be found, and the branch cannot be detected or GitHub is unreachable, tell the user to download the file manually.

Config Error: No Configuration file (config.yml) or Template file (config.yml.template) found in the config path, and the template file(config.yml.template) could not be downloaded from GitHub. Please visit the GitHub repository to manually download the config.yml.template file and place it in C:\Users\Yozora\Documents\Repositories\Kometa\config\config.yml.template prior to running Kometa again.

Type of Change

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• New feature (non-breaking change which adds functionality)

Checklist

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• Updated Documentation to reflect changes
• Updated the CHANGELOG with the changes