docs(tutorials): sync to Evo SDK 4.0.0-rc.2 and document token-burn scarcity

[thephez]

Summary

Re-syncs the tutorial docs to platform-tutorials after its Evo SDK 4.0.0-rc.2 upgrade (PRs dashpay/platform-tutorials#95, dashpay/platform-tutorials#96) and documents the DashMint Lab token-burn scarcity model introduced with the new SDK.

SDK 4.0.0-rc.2 sync

• Re-spliced 11 drifted snippets from the tutorials repo, including the SDK-4.0 API changes: EvoSDK.*Trusted({ version }), document.toJSON(version), DashMint token-gated minting, and the Dashnote concurrent-edit check.
• Repinned the three _static/*-lite.html companions to @dashevo/evo-sdk@4.0.0-rc.2.
• Withdraw tutorial amount raised to the protocol minimum (1000000n).
• Bumped the Node prerequisite from v20 to v22 (tutorials now require Node 22.22.x) in introduction.md, connecting-to-testnet.md, and both example-app pages.

DashMint token-burn scarcity

The SDK-4.0 DashMint Lab gates minting on burning a fixed-supply token, which was previously only visible in code comments. This documents it:

• New DashMint token flow section and Transfer DashMint tokens walkthrough, embedding dashMintToken.ts and transferDashMintTokens.ts.
• Registered both new blocks in tutorial-code-map.yml so they stay in sync (now 48/48 mappings).
• Updated the intro, "What this app does", TL;DR, and architecture tour to reflect token-gated minting; corrected the contract-schema prose now that creationRestrictionMode is 0 with scarcity enforced by tokenCost.create.

Dashnote cleanup

• Restructured the update-note walkthrough into steps and documented the expectedRevision concurrent-edit guard.
• Fixed the message maxLength description (the field is no longer length-capped).

Verification

• python3 scripts/tutorial-sync/sync_tutorial_code.py --check --source <platform-tutorials> → 48 matched, 0 drifted.
• All embedded code blocks are byte-identical to source; emphasize-line directives re-verified after the snippets grew.

Preview build: https://dash-docs-platform--152.org.readthedocs.build/en/152/

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[thephez]

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