chore: add new externs for file append and cpu time #3593

chore: add new externs for file append and cpu time

Usage Workflow file

10 warnings

Create Manifests: StandardLibrary/runtimes/net/Extern/UTF8.cs#L25

The variable 'e' is declared but never used

Create Manifests: StandardLibrary/runtimes/net/Extern/UTF8.cs#L30

The variable 'e' is declared but never used

Create Manifests: StandardLibrary/runtimes/net/Extern/UTF8.cs#L45

The variable 'e' is declared but never used

Create Manifests: StandardLibrary/runtimes/net/ImplementationFromDafny.cs#L16296

Unreachable code detected

Create Manifests: StandardLibrary/runtimes/net/ImplementationFromDafny.cs#L16465

Unreachable code detected

Create Manifests: StandardLibrary/runtimes/net/ImplementationFromDafny.cs#L16337

Unreachable code detected

Create Manifests: StandardLibrary/runtimes/net/ImplementationFromDafny.cs#L16506

Unreachable code detected

Create Manifests: StandardLibrary/runtimes/net/ImplementationFromDafny.cs#L16630

Unreachable code detected

Create Manifests: StandardLibrary/runtimes/net/ImplementationFromDafny.cs#L16648

Unreachable code detected

Create Manifests: StandardLibrary/runtimes/net/ImplementationFromDafny.cs#L16666

Unreachable code detected

succeeded Dec 16, 2024 in 5m 29s