chore(codex): add cloud environment setup script #1244

Job	Run time
Cargo Deny Check	33s
Preflight (Ubuntu Stable)	1m 56s
Sandbox Recovery Smoke	1s
Integration Build Check	1s
Clean Room Regeneration	1s
TS SDK Wasm Build	1s
Lua SDK Tests	1s
TS SDK Native on ${{ matrix.os }}	1s
Android Build Pipeline	1s
Codegen Drift Check	1s
Python SDK on ${{ matrix.os }}	1s
Kotlin SDK Test	1s
Rust ${{ matrix.rust }} on ${{ matrix.os }}	1s
.NET SDK on ${{ matrix.os }}	1s
Native Release Artifact on ${{ matrix.os }}	1s
C++ SDK Tests on ${{ matrix.os }}	1s
Go SDK Tests	1s
CI Success	3s
Swift SDK Tests	1s
iOS Build Pipeline	1s
C SDK Tests on ${{ matrix.os }}	1s
	2m 50s

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