More line breaking penalties for parentheses?

In shaping, we have line breaking penalties in place to avoid an opening parenthesis at the end of a line, and a closing parenthesis at the beginning of a line. These prevent the worst formatting possible for labels with parentheses, but perhaps we could add a few more penalties to further improve the display of these labels? E.g.:

// Encourage open parenthesis at beginning of line
if (nextCodePoint === 0x28 || nextCodePoint === 0xff08) {
	penalty -= 50;
}

// Penalize character immediately after open parenthesis at end of line
if (previousCodePoint === 0x28 || previousCodePoint === 0xff08) {
	penalty += 5;
}

// Penalize character immediately before close parenthesis at beginning of line
if (nextCodePoint === 0x29 || nextCodePoint === 0xff09) {
	penalty += 5;
}

@ChrisLoer thoughts? I'm happy to create a test branch and try out options myself, if you think that would be the most efficient workflow.

/cc @ajashton

Start in src/symbol/shaping.js around the existing line-breaking penalties at lines 169-177. Review how the current opening- and closing-parenthesis cases affect label layout, then try the proposed penalty options in a test branch. Done means agreeing on additional penalties that improve parenthesized labels without harming other line breaks, with validation for the resulting behavior.