Add xberg to Text Analysis

[Goldziher]

Adds xberg to Text Analysis — a document intelligence library (Rust core, MIT, 8.5k★) with a native Go binding that extracts text, tables, and metadata from PDFs, Office documents, and 97+ formats with optional OCR.

Forge link: https://github.com/xberg-io/xberg
pkg.go.dev: https://pkg.go.dev/github.com/xberg-io/xberg
goreportcard.com: https://goreportcard.com/report/github.com/xberg-io/xberg

[github-actions]

Automated Quality Checks

Required checks

❌ Repo: missing go.mod

How to fix: No go.mod file found at the repository root.
Initialize Go modules in your project:

go mod init github.com/your-org/your-project
go mod tidy
git add go.mod go.sum && git commit -m "add go module" && git push

✅ pkg.go.dev: OK
✅ Go Report Card: OK (grade unknown)

Additional checks

✅ License: MIT
✅ Maturity: repo has 5+ months of history
✅ CI/CD: GitHub Actions workflows detected
✅ README: present
⚠️ Coverage: missing from PR body

How to fix: Add a coverage service link to your PR description:

Coverage: https://app.codecov.io/gh/your-org/your-project

Popular options: [Codecov](https://codecov.io), [Coveralls](https://coveralls.io). Integrate one with your CI to track coverage automatically.

---
> **Action needed:** one or more required checks failed. Please update your PR body with the missing links and ensure the repository meets the [quality standards](https://github.com/avelino/awesome-go/blob/main/CONTRIBUTING.md#quality-standards).

_These checks are automated and do not replace maintainer review. See [CONTRIBUTING.md](https://github.com/avelino/awesome-go/blob/main/CONTRIBUTING.md) for full guidelines._

---

## PR Diff Validation

### Content checks

✅ **Files changed**: only README.md
✅ **Single item**: one package added
✅ **Link consistency**: README link matches forge link in PR body
✅ **Link text**: matches repository name
✅ **Description**: ends with punctuation
✅ **Description tone**: no promotional language detected
✅ **Category size**: Text Analysis has 11 items


_Automated diff validation — does not replace maintainer review._
<!-- Sticky Pull Request Commentpr-quality-check -->