docs: replace stale cashout script with swarm-cli in "Managing uncashed cheques"

[yjkellyjoo]

Problem

The "Managing uncashed cheques" section of Cashing Out (docs/bee/working-with-bee/cashing-out.md, lines 220–261) is stale in two ways:

1. It instructs users to wget an unaudited third-party gist, chmod +x it, and run it. The script dates from 2020 and only works on Linux/macOS.
2. It closes with an :::info callout asking Windows users to contribute a cashout script, pointing at ethersphere/bee#1092.

bee#1092 was closed in July 2021. In this comment, @agazso resolved the request: swarm-cli already cashes out cheques and runs on Windows, with Bee Dashboard as a GUI alternative. @acud closed the issue on those grounds. We are still soliciting a contribution that was answered five years ago.

This also contradicts our own docs. docs/bee/working-with-bee/introduction.md:23 already tells users they can "use the swarm-cli command line tool to … cash out your cheques", and docs/bee/working-with-bee/swarm-cli.md:10 calls swarm-cli "the recommended method for interaction with your Bee node from the command line" — yet no page in docs/ contains a single swarm-cli cheque command.

Proposed fix

Rewrite only the "Managing uncashed cheques" section of docs/bee/working-with-bee/cashing-out.md. The curl-based "Cashing out Cheques (SWAP)" section above it documents the raw Bee API and should stay as-is.

Keep lines 209–218 verbatim — the two paragraphs explaining what a cheque is and why holding an uncashed one is risky are conceptual and still accurate.

Keep the closing :::info about swap-swear-and-swindle (lines 263–267).

Replace lines 220–261 with swarm-cli guidance covering:

• A lead sentence recommending swarm-cli, linking to the existing ./swarm-cli.md page, noting it works on Linux, macOS and Windows — this replaces the Windows callout rather than leaving a hole where it was.
• Install: npm install --global @ethersphere/swarm-cli
• List uncashed cheques: swarm-cli cheque list — note that No uncashed cheques found. means there is nothing to cash (carries over the intent of the existing :::info at line 247).
• Cash out all: swarm-cli cheque cashout --all
• Cash out all above a threshold: swarm-cli cheque cashout --all --minimum <PLUR>
• Cash out a single peer: swarm-cli cheque cashout --peer <peer-address>
• A note that swarm-cli targets http://localhost:1633 by default, retargetable via --bee-api-url or the BEE_API_URL env var.
• One line pointing at Bee Dashboard as the GUI option — still actively maintained, and its repo description is literally "helps users to setup their Bee node and do actions like cash out cheques".

The existing :::important at lines 52–56 ("do not cash out too regularly") already covers cadence — don't repeat it.

Verified command surface

Checked against ethersphere/swarm-cli@master source rather than the 2021 comment (the flags there are still correct, but it never mentions cheque list or the PLUR unit):

Command	Source	Options
swarm-cli cheque list (alias ls)	src/command/cheque/list.ts	-m, --minimum <PLUR> (default 0)
swarm-cli cheque cashout (alias co)	src/command/cheque/cashout.ts	-a, --all / -p, --peer <address> (mutually exclusive, one required); -m, --minimum <PLUR> (default 1); --gas-limit, --gas-price (wei)
global	src/config.ts	--bee-api-url (default http://localhost:1633, env BEE_API_URL)

Two things to get right:

• -m/--minimum is in PLUR, not xBZZ (1 PLUR = 1e-16 xBZZ). Consistent with cashing-out.md:34 and docs/references/tokens.md:21.
• -m only filters on the --all path — cashout.ts ignores it when --peer is given. Don't imply otherwise.

Out of scope

• static/llms.txt:41 needs no change — its description ("Withdraw earnings from SWAP cheques") stays accurate, and no page is added, renamed, or removed.
• sidebars.js / docusaurus.config.mjs — no structural change.
• docs/bee/working-with-bee/swarm-cli.md:16 has an unrelated pre-existing defect (a dangling * Add stake: bullet with no command after the colon). Worth a separate issue.

Acceptance criteria

• grep -n "1092\|ralph-pichler\|cashout.sh" docs/bee/working-with-bee/cashing-out.md returns nothing.
• The section documents swarm-cli cheque list and swarm-cli cheque cashout with correct flags and the PLUR unit.
• The ## Managing uncashed cheques heading is unchanged, so the existing #managing-uncashed-cheques anchor still resolves.
• npm run build:check passes — MDX parses, no unclosed admonition, new links resolve, the removed gist link is gone.
• Follows CODING.md: one sentence per line, no unrelated reflowing outside the replaced range.