[Feature Request]: Add auto-generated notice at the top of generated file

[rytswd]

🔮 Relevant Command

importer generate

🗂 Language Type

All

🔎 Request Details

Because Importer is essentially code-generation tool, it should add a note at the top of the file that the file is created by some automation.

This could be useful for importer update as well, but importer update does not have any external template to be reviewed. From code review perspective, importer generate can benefit from this approach, but it may be better not to add such a note for importer update.

[rytswd]

This ticket is probably better tackled by some documentation around the use of .gitattributes.

https://docs.github.com/en/github/administering-a-repository/managing-repository-settings/customizing-how-changed-files-appear-on-github
https://github.com/github/linguist/blob/master/docs/overrides.md#generated-code

[rytswd]

This ticket should be still tackled, as importer generate template.md -o ./some/directory/output.md would break the importer references as the relative paths change. Along with #11, it would be important how the file was created using which template file.

Fixing up relevant paths for each entry may be another possibility, if generate is used once to create a new file, but update to be used going forward. I don't particularly see a use case for that, so that will be considered separately.