Reimplement the core without Sets, Maps, etc.

[jviide]

This pull request collects together multiple optimizations introduced mainly in #136. Also included are related modifications to the Preact & React integrations, introduced in #156.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6ac6923

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

This PR includes changesets to release 3 packages

Name	Type
@preact/signals-core	Minor
@preact/signals	Patch
@preact/signals-react	Patch

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[github-actions]

Size Change: +1.5 kB (+2%)

Total Size: 67.5 kB

Filename	Size	Change
docs/dist/assets/client.********.js	45.8 kB	+7 B (0%)
docs/dist/assets/index.********.js	839 B	-240 B (-22%)	🎉
docs/dist/assets/signals-core.module.********.js	1.58 kB	+596 B (+61%)	🆘
docs/dist/assets/signals.module.********.js	1.96 kB	+19 B (+1%)
docs/dist/nesting-********.js	1.13 kB	+1 B (0%)
packages/core/dist/signals-core.js	1.64 kB	+612 B (+60%)	🆘
packages/core/dist/signals-core.mjs	1.31 kB	+485 B (+59%)	🆘
packages/preact/dist/signals.js	1.13 kB	+11 B (+1%)
packages/preact/dist/signals.mjs	1.12 kB	+4 B (0%)
packages/react/dist/signals.js	834 B	+3 B (0%)
packages/react/dist/signals.mjs	797 B	+6 B (+1%)

ℹ️ View Unchanged

Filename	Size
docs/dist/assets/jsxRuntime.module.********.js	282 B
docs/dist/assets/preact.module.********.js	4 kB
docs/dist/assets/style.********.js	21 B
docs/dist/assets/style.********.css	1.21 kB
docs/dist/basic-********.js	244 B
docs/dist/demos-********.js	3.35 kB
docs/dist/react-********.js	239 B

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[marvinhagemeister]

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