fix(chart) :: line series up on a category axis for every chart type

[81reap]

Motivation

• ApexCharts pairs points by index on a text axis whatever the chart type, not only for bar, so a line or scatter chart whose series skip different labels draws points against the wrong ones.
• Filling the gap with zero, as a stack needs, would be wrong here: it draws a line down to zero where there is simply no measurement.

Description

• align_series takes what a missing point is worth: zero to add nothing to a stack, null to leave a gap.
• Align on a text axis for every chart type but rangeBar, whose y is a range and whose points ApexCharts already pairs by label.
• Add a changelog entry.

Testing

• 15 unit tests, the new ones covering the gap left for an unstacked series and a measured zero kept apart from a missing value.
• The browser suite passes 41 tests, eight of them new: area, scatter and heatmap charts lined up on a text axis, a rangeBar chart left alone, and a bubble chart keeping its point sizes.
• npm test checks 41 files and reports nothing.
• no console errors on card page fails for the reason described in fix(biome.js) :: fix remaining lint issues #1366, on this branch and on the unmodified base alike.

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GitHub cannot base a pull request on a branch that lives in a fork, so all eight target main and each one carries the commits of those above it. Review and merge them in order:

1. fix(biome.js) :: fix remaining lint issues #1366 :: fix(biome.js) :: fix remaining lint issues
2. fix(modal) :: give modal component an accessible name #1367 :: fix(modal) :: give modal component an accessible name
3. fix(map) :: ignore map coordinates that are not a pair of numbers #1368 :: fix(map) :: ignore map coordinates that are not a pair of numbers
4. feat(chart) :: render column charts as bar charts #1369 :: feat(chart) :: render column charts as bar charts
5. fix(chart) :: align stacked series on their X values #1370 :: fix(chart) :: align stacked series on their X values
6. fix(chart) :: line series up on a category axis for every chart type #1371 :: fix(chart) :: line series up on a category axis for every chart type ← this PR
7. fix(npm) :: install dependencies only once at root level #1372 :: fix(npm) :: install dependencies only once at root level
8. feat(typescript) :: typecheck browser JavaScript in CI #1373 :: feat(typescript) :: typecheck browser JavaScript in CI