feat(clients/js): add confidential transfer with fee helper (#1253)

* feat: add confidential transfer with fee helper

* Support record-backed transfer fee proofs

* Fix JS CI for transfer fee helper

* address comments

* Sync with main: adapt to @solana-program/record@0.3.0 and kit 7

This commit brings the confidential-transfer-with-fee helper in line with main's toolchain after rebasing (kit 6 → 7, TypeScript 5 → 6, zk-elgamal-proof 0.2 → 0.3.2).

record@0.1.0 (kit 5 only) forced a duplicate kit-6 install against main's kit-7 project, so it is bumped to ^0.3.0 (kit ^7). record@0.3.0 replaced its imperative API with a plan-based one, so the record-staging path in buildContextStateProofPlan is rewritten accordingly:

- createRecord(...) → getCreateRecordInstructionPlan(client, ...), with a fresh newRecord signer and a minimal getMinimumBalance client adapter.
- The manual chunked write loop (getRecordWriteInstructions) is removed; getWriteInstructionPlan self-chunks the payload across transactions.
- createCloseRecordInstruction(...) → getCloseAccountInstruction(...).

RecordBackedContextStateProofMode now extends ConfidentialTransferContextStateProofMode so the with-fee helper's rpc carries GetAccountInfoApi, which the (now async) auditor resolution from main's #1269 requires.

---------

Co-authored-by: Loris Leiva <loris.leiva@gmail.com>

Author: catmcgee

clients/js/package.json

@@ -50,6 +50,7 @@
     },
     "dependencies": {
         "@noble/curves": "^1.9.7",
+        "@solana-program/record": "^0.3.0",
         "@solana-program/zk-elgamal-proof": "^0.3.2"
     },
     "devDependencies": {