Update basic examples to Light SDK 0.22

[tilo-14]

• Bump all Light Protocol deps from 0.19/0.4 to 0.22
• Bump Solana SDK from 2.2 to 2
• Update CI setup action (Solana 2.3.11, Rust 1.90.0, caching)
• Adapt basic-macros and create-and-transfer to new SDK API

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[devin-ai-integration]

Devin Review found 1 potential issue.

View 5 additional findings in Devin Review.

[devin-ai-integration]

🟡 Missing node-version input declaration makes custom Node.js setup unreachable

The composite action references inputs.node-version in conditionals on lines 36 and 42, and uses it as a value on line 39, but node-version is never declared in the inputs: section (.github/actions/setup/action.yml:4-23). In GitHub Actions composite actions, an undeclared input always evaluates to empty string.

Root Cause and Impact

Because inputs.node-version is always '':

• Line 36: if: inputs.node-version != '' → always false → the "Setup Node.js" step never runs
• Line 42: if: inputs.node-version == '' → always true → the fallback "Setup Node.js (for Light CLI)" step always runs with hardcoded node 22

This means any future caller passing node-version to this action will have it silently ignored (GitHub Actions warns about unexpected inputs but does not fail). The intended flexibility to configure a custom Node.js version is completely non-functional.

The fix is to add node-version to the inputs: block with required: false and an empty default.

Prompt for agents

In .github/actions/setup/action.yml, add a `node-version` input declaration to the `inputs:` block (around line 5-23). It should be optional with an empty default, for example:

  node-version:
    description: "Node.js version (leave empty for default 22)"
    required: false
    default: ""

This should be added alongside the other input declarations (e.g., after `photon-indexer` around line 23) so that the conditional logic on lines 36 and 42 that references `inputs.node-version` actually works as intended.

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