generate should not create .editorconfig (et al.), that should be part of an init command

[kylegoetz]

Problem

.editorconfig is a configuration file to help developers in creating a TSG. generate is to generate a TSG once it's already been coded by a developer.

Currently, the CLI checks to see if the file exists, and if it does not, it generates one from the template. It does this with other files, too. ("The first time you run tree-sitter generate, it will also generate a few other files for bindings")

If the developer does not want an .editorconfig file (or one of the others), there doesn't seem to be a way to prevent generate from adding one.

The TSG manual online indicates generate is the command both for initializing/scaffolding a project and for generating code for parsing every time you make changes to the grammar. ("After making changes to your grammar, just run tree-sitter generate again.")

However, some of what generate does is more properly organized as init code. Copying template .editorconfig, .gitignore, .gitattributes, parser.c, the Rust bindings, etc. files are all properly initialization code, not code for generating/building.

I'd be happy to file a PR for this, and I think it makes logical sense. I can't recall an application I've used where scaffolding and building were the same command.

Steps to reproduce

Look in [cli/src/generate/grammar_files.rs](https://github.com/tree-sitter/tree-sitter/blob/32cfceec6200ea5e4295e5182cb6d69045397333/cli/src/generate/grammar_files.rs#L29)

Observe the code

// Write .editorconfig file
    missing_path(repo_path.join(".editorconfig"), |path| {
        generate_file(path, EDITORCONFIG_TEMPLATE, language_name)
    })?;

Expected behavior

There should be a new command, tree-sitter init that does the scaffolding. generate should not do anything that isn't necessary for generating the grammar.json, etc. much like how one would expect tree-sitter build not to create a non-transient .editorconfig.

Tree-sitter version (tree-sitter --version)

tree-sitter 0.20.8

Operating system/version

macOS 12.0.1

[amaanq]

Splitting up the command into two is planned for the near future, the --no-bindings flag currently allows users to opt out.

[ObserverOfTime]

Might as well keep this open until then.