A couple of optimizations are done in this PR. One, we now will check config ahead of time to see if a module is disabled before running any module code. Also, we won't try to discover a git repository unless the module requests access to it.
- Create subcommands to be able to print modules independently
- `starship prompt` will print the full prompt
- `starship module <MODULE_NAME>` will print a specific module
e.g. `starship module python`
- Added `--path` flag to print the prompt or modules without being in a specific directory
- Added `--status` flag to provide the status of the last command, instead of requiring it as an argument
- Refactored integration tests to be end-to-end tests, since there was no way in integration tests to set the environment variables for a specific command, which was required for the `username` module
- Moved e2e tests to `tests/testsuite` to allow for a single binary to be built
- Tests will build/run faster
- No more false positives for unused functions
- Added tests for `username`
- Removed codecov + tarpaulin 😢
