Improve large dependency graph layout

[JoviDeCroock]

Large signal graphs rendered each dependency layer as one tall column, causing Fit View to shrink the graph into an unreadable line.

Wrap dense layers into balanced columns while preserving dependency ordering so large graphs remain visible and navigable.

[changeset-bot]

🦋 Changeset detected

Latest commit: 8de8053

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@preact/signals-devtools-ui	Patch
preact-signals-devtools	Patch

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[github-actions]

Size Change: -6.99 kB (-3.73%)

Total Size: 181 kB

📦 View Changed

Filename	Size	Change
docs/dist/assets/bench-********.js	1.6 kB	+1 B (+0.06%)
docs/dist/assets/devtools-********.js	912 B	+1 B (+0.11%)
docs/dist/assets/EmbeddedDevtools-********.js	17.8 kB	+132 B (+0.75%)
docs/dist/assets/index-********.js	1.09 kB	-7.33 kB (-87.01%)	🏆
packages/devtools-ui/dist/devtools-ui.js	16.3 kB	+114 B (+0.7%)
packages/devtools-ui/dist/devtools-ui.mjs	15.7 kB	+93 B (+0.6%)

ℹ️ View Unchanged

Filename	Size
docs/dist/assets/client-********.js	46.6 kB
docs/dist/assets/jsxRuntime.module-********.js	300 B
docs/dist/assets/preact.module-********.js	4.74 kB
docs/dist/assets/signals-core.module-********.js	1.92 kB
docs/dist/assets/signals.module-********.js	2.65 kB
docs/dist/assets/style-********.css	5.26 kB
docs/dist/assets/Unmount-********.js	652 B
docs/dist/assets/utils.module-********.js	516 B
docs/dist/basic-********.js	250 B
docs/dist/nesting-********.js	1.15 kB
docs/dist/react-********.js	242 B
packages/core/dist/signals-core.js	1.94 kB
packages/core/dist/signals-core.mjs	1.93 kB
packages/debug/dist/debug.js	4.64 kB
packages/debug/dist/debug.mjs	4.15 kB
packages/devtools-adapter/dist/devtools-adapter.js	2.36 kB
packages/devtools-adapter/dist/devtools-adapter.mjs	2.07 kB
packages/preact-transform/dist/signals-transform.js	1.3 kB
packages/preact-transform/dist/signals-transform.mjs	1.29 kB
packages/preact-transform/dist/signals-transform.umd.js	1.42 kB
packages/preact/dist/signals.js	1.81 kB
packages/preact/dist/signals.mjs	1.74 kB
packages/react-transform/dist/signals-transform.js	7.28 kB
packages/react-transform/dist/signals-transform.mjs	6.47 kB
packages/react-transform/dist/signals-transform.umd.js	7.39 kB
packages/react/dist/signals.js	214 B
packages/react/dist/signals.mjs	165 B
packages/vite-plugin/dist/vite-plugin.js	8.86 kB
packages/vite-plugin/dist/vite-plugin.mjs	7.86 kB

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