Static
Create PackedAccounts with system accounts pre-added. Auto-selects V1 or V2 account layout based on featureFlags.
Use newWithSystemAccounts - it auto-selects V2 when appropriate.
Add Light system accounts. Auto-selects V1 or V2 layout based on featureFlags.
Use addSystemAccounts - it auto-selects V2 when appropriate.
Create PackedAccounts with system accounts pre-added. Auto-selects V1 or V2 account layout based on featureFlags.