Add test to verify fonts export to SVG without arc commands

[Copilot]

Validates that font text models convert BezierCurve arcs back to BezierSeeds during SVG export, ensuring no arc (A) commands appear in the output.

Changes

• Test: Added textFromFontNoArcsInSVG() validating ArbutusSlab-Regular and NewRocker-Regular fonts export without arc commands using "Hello World" test string to validate multiple character shapes
• Documentation: Added .github/copilot-instructions.md documenting build artifacts and lockfiles that should never be committed (but not gitignored)
• Reverted: Restored build artifacts and lockfiles to their original state

Test Coverage

The test creates text models with "Hello World" and validates:

• SVG export completes successfully
• All path elements in the output are checked
• No arc (A/a) commands are present in any path data
• BezierSeeds (Q/C commands) are used instead

var textModel = new makerjs.models.Text(font, 'Hello World', 100);
var svg = makerjs.exporter.toSVG(textModel);
var pathMatches = svg.match(/<path[^>]*d=['"]([^'"]*)['"]/g);
pathMatches.forEach(function(pathElement) {
    var pathData = pathDataMatch[1];
    var hasArcCommand = /\b[Aa]\b/.test(pathData);
    assert.ok(!hasArcCommand, 'SVG path should not contain arc (A/a) commands');
});

The test confirms BezierCurves generated from fonts are properly unified back to BezierSeeds (Q/C commands) rather than remaining as approximating arcs during SVG export, validating across diverse character shapes including uppercase, lowercase, and letters with various curves.

Testing

• ✅ All 4 Text tests pass
• ✅ Font rendering validated for multiple character shapes
• ✅ No regressions in existing functionality

Original prompt

add a test for a font - that there should be no arcs in SVG output. Hoping that complete conversion back to BezierSeeds happens.

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[danmarshall]

@copilot undo your commits to these files:
docs/target/js/browser.maker.js
package-lock.json
packages/fonts/gen.js

[Copilot]

@copilot undo your commits to these files:
docs/target/js/browser.maker.js
package-lock.json
...

Done. Reverted these files to their original state in commit e2e2dcd.

[danmarshall]

@copilot nice work. can we do more characters than just 'A'

[Copilot]

@copilot nice work. can we do more characters than just 'A'

Done. Expanded the test to use "Hello World" instead of just 'A', and updated the test to check all path elements in the SVG output. Commit 3d6aeba.