Remove getter and setter methods from TransformOptions

[SeanPMulligan]

This commit removes the getter and setter methods for print_ir_before_all and makes the print_ir_before_all field public. It also removes the setter method for write and makes the writer field public. Reference to issue #44

[rikhuijzer]

Hi @SeanPMulligan thank you for making this pull request. It definitely looks like it's going in the right direction. Could you also verify that the tests pass though? This is the error

error[E0599]: no method named `set_print_ir_before_all` found for struct `xrcf::TransformOptions` in the current scope
   --> arnoldc/src/main.rs:125:21
    |
125 |             options.set_print_ir_before_all(true);
    |                     ^^^^^^^^^^^^^^^^^^^^^^^ method not found in `TransformOptions`

error[E0599]: no method named `set_writer` found for struct `xrcf::TransformOptions` in the current scope
   --> arnoldc/src/main.rs:128:21
    |
128 |             options.set_writer(out);
    |                     ^^^^^^^^^^ method not found in `TransformOptions`

For more information about this error, try `rustc --explain E0599`.
error: could not compile `arnoldc` (bin "arnoldc" test) due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
Error: Process completed with exit code 101.

To locally verify that everything works run

cargo test

or

cargo watch -x test

[rikhuijzer]

Very nice! Thank you!