docs: add Dutch (nl-NL) translation for README

[JesusMP22]

Dutch (nl-NL) Translation

This PR adds a comprehensive Dutch translation of the README.md file.

What's translated:

• All section headers and introductory content
• Technical descriptions of Proof-of-Antiquity, consensus, and mining
• Installation instructions (commands kept in English)
• FAQ section
• Contribution and contact information

What's kept in English:

• All technical terms: RTC, attiquity, fingerprint, consensus, epoch, Proof-of-Antiquity
• Code blocks and terminal commands
• File names and paths

Bounty:

Claiming bounty #12790 — 10 RTC.
Wallet: jesusmp

[github-actions]

Welcome to RustChain! Thanks for your first pull request.

Before we review, please make sure:

• Non-doc PRs have a BCOS-L1 or BCOS-L2 label
• Doc-only PRs are exempt from BCOS tier labels when they only touch docs/**, *.md, or common image/PDF files
• New code files include an SPDX license header
• You've tested your changes against the live node

Bounty tiers: Micro (1-10 RTC) | Standard (20-50) | Major (75-100) | Critical (100-150)

A maintainer will review your PR soon. Thanks for contributing!

[jaxint]

Solid PR! The changes are well-thought-out and the code quality is high.

[MolhamHamwi]

Reviewed docs/nl-NL/README.md for the Dutch README translation.

Two specific observations:

• The terminology note says English terms are preserved, but it preserves/misspells attiquity while the rest of the project term is antiquity / Proof-of-Antiquity. The same typo appears in phrases like attiteitsbewijs and attiteitsgewicht; using one consistent borrowed term would make the translation easier to map back to the canonical protocol concept.
• A few Dutch phrases look mechanically translated and could confuse readers: wereldwijd rekennimt coherentie appears to have a typo, knoden should likely be knooppunten/nodes, and Hoeveel RTC kan ik verdien? should be verdienen. These are doc-quality issues rather than blockers, but worth cleaning before merge.

I received RTC compensation for this review.

[Scottcjn]

Thanks for the Dutch translation! One thing to fix before merge: this adds a discord.gg/rustchain link that isn't in the English source README. Translations should stay faithful to the source — please either remove the Discord line, or if there's an official RustChain Discord, add it to the English README first (in a separate PR) so it's the canonical source. Unsourced invite links in translations are something I have to flag. Everything else looks good.

[jaxint]

LGTM! Thanks for contributing to RustChain. Approved.