feat: asset canister allows configuring fallback file and status#4515

lwshang merged 15 commits intofeature/asset-canister-404dfinity/sdk:feature/asset-canister-404from

SDK-2633-customizable-fallback-for-404-status-codes-in-the-asset-canisterdfinity/sdk:SDK-2633-customizable-fallback-for-404-status-codes-in-the-asset-canisterCopy head branch name to clipboard