Add changesets

Author: bobsingor

.changeset/engines-callout-freetext.md

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+---
+'@embedpdf/engines': minor
+---
+
+Support callout free text in the PDFium executor: read/write `/CL`, `/LE`, `/IT`, stroke width and colors, `/TextColor`, and remap rectangle differences (`/RD`) between native PDFium order and the model shape.

.changeset/models-callout-freetext.md

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+---
+'@embedpdf/models': minor
+---
+
+Extend free text annotation typing for callouts: add `PdfAnnotationColorType.TextColor` and optional `calloutLine`, `lineEnding`, `strokeWidth`, and `strokeColor` on `PdfFreeTextAnnoObject`.

.changeset/pdfium-callout-freetext.md

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+---
+'@embedpdf/pdfium': minor
+---
+
+Expose EmbedPDF callout line helpers in the WASM bindings (`EPDFAnnot_GetCalloutLineCount`, `EPDFAnnot_GetCalloutLine`, `EPDFAnnot_SetCalloutLine`) and refresh bundled `pdfium.js` / `pdfium.cjs` / `pdfium.wasm`.

.changeset/plugin-annotation-callout-freetext.md

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+---
+'@embedpdf/plugin-annotation': minor
+---
+
+Add callout free text (`FreeTextCallout`): creation handler and preview data, vertex config and patch pipeline, default `freeTextCallout` tool, and built-in renderers for React, Vue, and Svelte (including preview components and shared `calloutVertexConfig`).

.changeset/snippet-callout-freetext.md

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+---
+'@embedpdf/snippet': minor
+---
+
+Wire callout into the snippet viewer: callout icon, `annotation:add-callout` command, annotation toolbar and overflow menu entries, translations, and sidebar property schema for `freeTextCallout` (including opaque stroke color control).