Add onEnterRules for regular old comments in R

[juliasilge]

Addresses #5974

The order in this JSON file is important; if you put the regular comment rule before the ones for plumber and roxygen, it takes precedence and we lose the special behavior for plumber and roxygen. It has to go after.

We have continuation behavior for Python already here:

positron/extensions/positron-python/src/client/language/languageConfiguration.ts

Lines 25 to 33 in c200f27

	// continue comments
	{
	beforeText: /^\s*#.*/,
	afterText: /.+$/,
	action: {
	indentAction: IndentAction.None,
	appendText: '# ',
	},
	},

It is slightly different than what we've chosen for R; it will continue in the middle of a comment but not at the end. We inherit this behavior from upstream, while the R behavior was chosen to be more like RStudio. It's a little weird that the behavior is different but maybe appropriate, for the two language communities?

Release Notes

New Features

• Added continuation for regular comments for R

Bug Fixes

• N/A

QA Notes

The comment continuation for roxygen (#') and plumber (#*) should continue to work in .R files in R Quarto cells, and now we will additionally continue regular old comments (#) in the same spots.

[github-actions]

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