chore: archive an SDK and do a light clean-up round

[novusnota]

npm run fmt, npm run spell, a hyphen replacement, an archival of ton-kotlin, and a cautionary tale on royalties.

Summary by CodeRabbit

• Documentation

  • Enhanced style guide with expanded safety warnings, formatting requirements, and writing best practices
  • Clarified NFT reference implementation and wallet address verification documentation
  • Improved NFT comparison and system contract descriptions
  • Reorganized NFT-2.0 references with redirects to comparison page

• Bug Fixes

  • Fixed typo in API endpoint documentation
  • Normalized typographic characters and hyphenation across documentation

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d7753056-b9e9-4ee2-a9fc-c2cd389a1b89

📥 Commits

Reviewing files that changed from the base of the PR and between 424a75e and 9f0e5be.

📒 Files selected for processing (1)

• standard/tokens/nft/comparison.mdx

📝 Walkthrough

Walkthrough

This PR standardizes documentation across the TON docs repository: refines the contributing style guide with stricter safety and formatting guidelines, restructures NFT documentation by removing nft-2.0 and updating related redirects, clarifies NFT reference implementation and wallet authentication flows, and normalizes typography (ASCII hyphens) across 40+ files for encoding consistency.

Changes

Documentation Standards, Navigation, and Content Clarifications

Layer / File(s)	Summary
Contributing standards and documentation guidelines contribute/style-guide.mdx	Expanded guidance on answer-first structure, scannability, copy-paste-safe examples, explicit Caution/Warning callouts for fund/key/mainnet risks, root-absolute internal links, and Image component requirements with alt text and darkSrc handling.
Spellcheck configuration .cspell.jsonc	Extended filename-specific overrides to ignore API-related terms (multisigs, Uninited) and docs.json references (subsecond).
NFT-2.0 deprecation in navigation and redirects docs.json	Removed nft-2.0 from standard/tokens/nft navigation pages; updated redirects for /v3/documentation/dapps/assets/nft-2.0 and /standard/tokens/nft/nft-2.0 to point to comparison page.
NFT verification and comparison documentation standard/tokens/nft/verify.mdx, standard/tokens/nft/comparison.mdx	Added off-chain API verification method subsection; expanded cNFT vs Default Collection capability table with eligibility, minting permissions, use cases, and trade-offs; clarified Single NFT bullet list.
NFT reference implementation clarification standard/tokens/nft/nft-reference.mdx	Reflowed and clarified documentation for TEP-62/66 requirements, internal message headers (explicit non-bounceable explanation), royalty handling, collection and item get-method behavior, and metadata composition.
NFT overview and fundamentals documentation standard/tokens/nft/overview.mdx, standard/tokens/nft/how-it-works.mdx	Standardized "Non-Fungible" terminology and best-practice punctuation across NFT introduction and fundamentals sections.
Wallet authentication and configuration clarification standard/wallets/how-it-works.mdx, standard/wallets/interact.mdx, standard/wallets/mnemonics.mdx, standard/wallets/preprocessed-v2/specification.mdx	Enhanced Ed25519 signature verification explanation, clearer subwallet_id/wallet_id descriptions, improved mnemonic-format comments, and expanded wrap-around safety guidance for seq_no replay protection.
Typography and encoding standardization across documentation contract-dev/blueprint/*, ecosystem/**/*, foundations/**/*, standard/**/*, tolk/**/*, tvm/**/*	Systematic normalization of non-ASCII hyphen characters to standard ASCII hyphens (e.g., on‑chain → on-chain, TL‑B → TL-B) and apostrophe/quote standardization across 40+ files for encoding consistency.
Documentation layout and spacing refinements ecosystem/tma/analytics/*, ecosystem/tma/telegram-ui/*, ecosystem/explorers/overview.mdx, ecosystem/status.mdx	Minor spacing adjustments between sections and table reformatting for improved visual clarity (blank-line separation in install guides, markdown table alignment).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• ton-org/docs#2104: Reorders NFT navigation entries in docs.json; this PR removes nft-2.0 from the same navigation section and updates related redirects.

Suggested reviewers

• it09
• kay-is
• delovoyhomie

Poem

🐰 A rabbit hops through docs with care,
Fixing hyphens everywhere!
NFT-2.0 takes its final bow,
ASCII hyphens shining now. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main changes: archiving SDK content (ton-kotlin removal from sdks.mdx and nft-2.0 deprecation) and performing documentation cleanup (typography normalization, rewording, formatting fixes across 30+ files).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch novusnota/light-cleanup

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