chore: remove Solana CCT tooling and align CCIP docs/scripts

[SyedAsadKazmi]

Summary

• Remove cross-chain token (CCT) pool, admin, and token-creation code from this repo now that those workflows live in ccip-solana-bs58-generator.
• Keep CCIP messaging, router transfers, token delegation, receiver scripts, and Data Feeds functionality.
• Fix @solana/web3.js version conflicts (^1.98.0 direct dependency + npm overrides / Yarn resolutions) so yarn type-check passes.
• Update READMEs and script help text to match current package.json commands (svm:*, evm:*).

What was removed

• ccip-scripts/svm/pool/, ccip-scripts/svm/admin/
• Token create/mint scripts (create-token-*, mint-tokens)
• CCT-only SDK modules (tokenpools/, burnmint-pool-bindings/, related PDAs/utilities)
• Matching package.json scripts (svm:pool:*, svm:admin:*, svm:token:create*, svm:token:mint)

What remains

• CCIP router scripts (fee, token transfer, messaging, data+tokens)
• Token prep scripts (wrap, delegate, check)
• CCIP receiver scripts
• EVM CCIP scripts (including evm:check-fee)
• Data Feeds demo (chainlink_solana_demo, client.js, read-data)

Docs fixes

• Redirect CCT setup to ccip-solana-bs58-generator in READMEs
• Document evm:check-fee
• Align Node.js requirement to v20+ across READMEs
• Replace stale yarn ccip:* examples with yarn svm:* in script help/output

[github-actions]

👋 SyedAsadKazmi, thanks for creating this pull request!

To help reviewers, please consider creating future PRs as drafts first. This allows you to self-review and make any final changes before notifying the team.

Once you're ready, you can mark it as "Ready for review" to request feedback. Thanks!