Adds namespace fix for nested sequence and adds support for nested ty… · amazon-ion/ion-cli@7b6f44e

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v2, actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L1

unused import: `IonResult`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L31

unused import: `enum_type::EnumType`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L154

unused import: `nested_type_1::NestedType1`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L382

unused import: `sequence_with_enum_element::SequenceWithEnumElement`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L448

unused import: `nested_type_3::NestedType3`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L473

unused import: `struct_with_enum_fields::StructWithEnumFields`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L642

unused import: `nested_type_5::NestedType5`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L40

unused variable: `reader`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L44

unused variable: `writer`

Cargo Test: code-gen-projects/rust/code-gen-demo/target/debug/build/code-gen-demo-02159c55d43ae910/out/ion_generated_code.rs#L457

unused variable: `reader`

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