* Closes#2032.
* Adds the `juvix dev core normalize` command.
* Adds the `:n` command in JuvixCore REPL.
* Adds the `--normalize` flag to `juvix dev core read` and `juvix dev
core from-concrete`.
* Adds `pipeline-normalize` which denotes pipeline steps necessary
before normalization.
* Adds normalization tests in `tests/VampIR/positive/Core`.
