Make foam respect the .gitignore file

Is your feature request related to a problem? Please describe.

The graph view plots all the files in the repository. This is a problem if the user has a virtual env installed in the repository, becuase it will plot all the .md files in the env. This also applies to wikilink autocompletion, where the pop-up will include all the files in the venv.

Describe the solution you'd like

Make foam respect the .gitignore file, meaning that the folders and files defined in .gitignore should be ignored by foam entirely.

Describe alternatives you've considered

The user could filter the filetypes in Foam > Files: Notes Extensions and use a custom filetype, but this is really not an alternative.

Screenshots or Videos

No response