fix: repair stale/broken links across 4 READMEs

[NikkiAung]

Summary

Ran a systematic sweep over every README.md/readme.MD/*.mdx in the repo — 47 markdown files, 119 relative links extracted and resolved against disk — and found 4 files with genuinely broken content. Each was verified by hand against the current source it's supposed to document (not just a link-existence check).

• basics/close-account/anchor/README.md — the program was renamed from destroy-an-account to close-account (directory, file names, and implementation approach all changed — close_user.rs now uses a declarative close = user account constraint instead of the old imperative .close() call), but the README was never updated. This is the meatiest fix: 3 dead links, 2 stale code snippets rewritten to match current source, and the test-description prose corrected (the old README described checking fetchNullable both before creation and after closing; the current test only checks null after closing).
• basics/favorites/anchor/README.md — link text and URL were swapped: [url](text) instead of [text](url).
• tokens/transfer-tokens/README.md — links to tokens/spl-token-minter and tokens/nft-minter, neither of which exists. Repointed to the current equivalents covering the same topics: tokens/create-token and tokens/nft-operations.
• tokens/token-2022/nft-meta-data-pointer/README.md — a copy-paste artifact had merged two separate links into one broken nested construct; restored the single intended cookbook link.

All docs-only, zero code/build risk.

Test plan

• Re-ran the link-resolution sweep after editing — 0 broken relative links out of 119 (down from 7 broken across these 4 files before)
• Verified every replacement target exists with exact case via git ls-files (what Linux CI sees, not macOS's case-insensitive filesystem)
• Manually re-read close-account/anchor/README.md end-to-end against create_user.rs, close_user.rs, and tests/test.ts to confirm the rewritten snippets/prose are accurate to current code
• Repo-wide search for other references to the old renamed paths (destroy-an-account, spl-token-minter, nft-minter) — none found outside these files

[greptile-apps]

Greptile Summary

The PR repairs stale or malformed documentation links and updates the close-account tutorial to match the current implementation.

• Renames stale close-account references and synchronizes its snippets and test description with the current source.
• Corrects malformed links in the Favorites and Token-2022 documentation.
• Replaces removed token-example links and accurately describes the replacement examples as related resources.

Confidence Score: 5/5

The documentation-only PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
basics/close-account/anchor/README.md	Updates paths, snippets, terminology, and test prose to document the current close-account Anchor example.
basics/favorites/anchor/README.md	Corrects the reversed Markdown syntax for the course link.
tokens/token-2022/nft-meta-data-pointer/README.md	Repairs the malformed nested Markdown link to the Solana cookbook.
tokens/transfer-tokens/README.md	Replaces stale example links and resolves the prior overstatement by describing the targets as related token and NFT examples.

_{Reviews (2): Last reviewed commit: "fix(#666): stop overpromising ATA covera..." | Re-trigger Greptile}

[greptile-apps]

Links overstate ATA coverage

The changed sentence directs readers to these examples to learn about Associated Token Accounts, but create-token does not cover ATAs and nft-operations only uses them incidentally. Describe them as related token and NFT examples instead so readers are not promised an explanation the targets do not provide.

Suggested change

	Check out [Create an SPL Token](../create-token) or [NFT Operations](../nft-operations) to learn more about Associated Token Accounts.
	Check out [Create an SPL Token](../create-token) and [NFT Operations](../nft-operations) for related token creation and NFT examples.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

[NikkiAung]

Good catch — neither example actually explains ATAs, so that was overpromising. Reworded per your suggestion in 3352271.