upgrade: signal-builders package upgrade for Solid 2.0

[davedbase]

Upgrades @solid-primitives/signal-builders to solid-js@^2.0.0-beta.13.

Changes

Solid 2.0 compatibility

• Removed on() helper usage in capitalize (API removed in 2.0) — replaced with a plain createMemo
• Updated tests to create signals outside createRoot and call flush() after writes, required by Solid 2.0's owned-scope write restriction and async batching model

Bug fixes

• get and merge were missing createMemo wrappers — they declared Accessor<T> return types but returned plain non-reactive values; this fixes them to actually be reactive

Package

• Peer dependency bumped to solid-js@^2.0.0-beta.13

Docs & metadata

• README rewritten: cleaner usage section, fixed typos (intiger, an float, recursing), collapsed the "Object/Array" category into "Object", clarified remove vs filterOut distinction, noted shallow-merge behavior on merge and setter-function support on update, removed the outdated "proof of concept" section
• Source comments cleaned up: removed comments that restated function names; kept only non-obvious behavioral notes
• package.json: fixed placeholder author, updated primitive.list, added keywords

Breaking changes

• solid-js@^2.0.0-beta.13 is now required
• get() and merge() now return reactive Accessor<T> values — code that treated their results as plain values (working around the previous bug) will break

Summary by CodeRabbit

• Documentation

  • Updated package readme with revised usage guidance, installation instructions, and builder reference documentation with expanded coverage examples.

• Refactor

  • Migrated to Solid.js v2.0-beta.13; get and merge now return reactive accessor values (breaking change from previous non-reactive behavior).

• Tests

  • Updated test suite for Solid.js v2.0-beta.13 compatibility.

• Chores

  • Updated peer dependencies and package metadata.

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🦋 Changeset detected

Latest commit: b7fba70

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

This PR includes changesets to release 1 package

Name	Type
@solid-primitives/signal-builders	Major

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@packages/signal-builders/src/string.ts`:
- Line 7: The current memoized capitalisation uses s[0]!.toUpperCase() which
will throw for empty strings; update the createMemo callback (the function that
reads const s = string()) to early-return an empty string (or s) when s === ""
(or s.length === 0) before calling s[0]!.toUpperCase(), otherwise perform the
existing s[0]!.toUpperCase() + s.substring(1).toLowerCase() logic so empty input
no longer crashes.

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Fix all unresolved CodeRabbit comments on this PR:

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📥 Commits

Reviewing files that changed from the base of the PR and between 8e8ff1e and b26edb6.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (10)

• .changeset/signal-builders-solid2-migration.md
• packages/signal-builders/README.md
• packages/signal-builders/package.json
• packages/signal-builders/src/array.ts
• packages/signal-builders/src/convert.ts
• packages/signal-builders/src/number.ts
• packages/signal-builders/src/object.ts
• packages/signal-builders/src/string.ts
• packages/signal-builders/src/update.ts
• packages/signal-builders/test/index.test.ts

💤 Files with no reviewable changes (1)

• packages/signal-builders/src/convert.ts