feat: add page translate function

[mo-bai]

What?

I added one [translate] function to the PDFPage class . the method can translate annotations and content of the PDF's page . not only then content .

let source = await PDFDocument.load(readFile(path))
const pdfDoc = await PDFDocument.create()
let pages = await pdfDoc.copyPages(source, source.getPageIndices())
for (let page of pages) {
page.translate(50,50)
pdfDoc.addPage(page)
const pdfBytes = await pdfDoc.save()

Why?

In many pdf files, annotations and text content is followed together, the library currently only provides the translateContent method, if you use the method will cause misalignment of annotations and text . also , there are no methods in the library for moving annotations

How?

In my method, I first find all the annotations and then trnaslate the annotations by adding or subtracting numbers from the location information in the annotations

Testing?

I created a pdf file, marked the annotation on top of a word, and then use my method [ translate(20,20) ] , and then check if the annotation deviates from the word . Result: No offset . then repeat doing this test by using different annotation type

New Dependencies?

no

Screenshots

the yellow line is annotation

Suggested Reading?

Yes , but the url(https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/PDF32000_2008.pdf) is 404

Anything Else?

Checklist

• I read CONTRIBUTING.md.
• I read MAINTAINERSHIP.md#pull-requests.
• I added/updated unit tests for my changes.
• I added/updated integration tests for my changes.
• I ran the integration tests.
• I tested my changes in Node, Deno, and the browser.
• I viewed documents produced with my changes in Adobe Acrobat, Foxit Reader, Firefox, and Chrome.
• I added/updated doc comments for any new/modified public APIs.
• My changes work for both new and existing PDF files.
• I ran the linter on my changes.

[anodynos]

@mo-bai please check my comment here

[Sharcoux]

Missing:

• tests
• documentation