Implement first iteration

The following functionality shall be added for the first iteration:

Create a NOTICE.txt from a given project directory (defined by a go.mod file)

gotice [project dir] [output file]

e.g.:

gotice ./project/ ./project/dist/windows-amd64/NOTICE.txt

Tasks to be completed for the first iteration:

• Add default files (.github/, .gitlab/, .vscode/, README, LICENSE, CHANGELOG, .gitignore, ...)
• Add version package
• Add cli
• Add buildin text template
• Add gomod analysis
• Add LICENSE extractor
• Add mage file
• Add ci