New lff autoformatter for Lingua Franca files

[cmnrd]

This PR refactors the org.lflang.cli package.

1. It includes the org.lflang.cli package as a subpackage in org.lflang. This closes Move contents of org.lflang.lfc to a subpackage lfc within org.lflang #1421.
2. It simplifies the gradle build such that a single jar (org.lflang-0.3.1-SNAPSHOT.jar) is created. This jar includes both the lfc and lff main classes. The main build task is now called buildAll. buildLfc is still available but shows a deprecation warning.
3. It introduces an lff script to invoke the lingua franca formatter. This closes Create lff script #1369.
4. It renames the build script to build-lf-cli and drops the --run option. Note that the old build script is still available, but prints a deprecation warning. The --run option was dropped because it would be unclear which command to run. Also the run tasks that we provide for gradle already implement this functionality.

There are still a couple of unresolved issues though:

• Fix and rename the build-lfc script. Should we name it build-all?
• Add lff.ps1 script for Windows. (@axmmisaka)
• There is a test class LfcIssueReportingTest.kt in org.lflang.cli.test, but I was not able to move it to the new location and make it work with gradle. @oowekyala can you help with this?
• We should update the developer documentation and use the buildAll task instead of buildLfc. Also build-lf-cli should be used instead of build-lfc. See Update the developer documentation to use the build-lf-cli script and the buildAll gradle task lf-lang.github.io#106
• Open an issue to keep track of the deprecated tools and remove them for next release. See Remove the build-lfc script and the buildLfc gradle task #1431
• Update the .github/scripts/package_lfc.sh script (and rename to package.sh?)
• Document changes required to release workflow https://github.com/lf-lang/release-tools/issues/16

[axmmisaka]

Haha, @cmnrd is faster than me on this…… I’ll review this PR then

[lhstrh]

Still some open tasks though!

[cmnrd]

@axmmisaka Do you have access to a Windows machine? You could fix the lfc.ps1 script and add a similar one for lff

[axmmisaka]

@axmmisaka Do you have access to a Windows machine? You could fix the lfc.ps1 script and add a similar one for lff

Yes! I’ll take care of it

[axmmisaka]

Just as a reminder things like this needs to be changed as well

[axmmisaka]

As of c036e4c, ./gradlew buildAll does not produce jar - ./gradlew assemble is required.

[lhstrh]

🚀 🚀 🚀

[cmnrd]

As far as I am concerned this is ready to be merged! The only point that is still unclear to me is whether the changes here affect the release toolflow. @lhstrh can you comment on this and perhaps open an issue in the workflow repo?

[lhstrh]

As far as I am concerned this is ready to be merged! The only point that is still unclear to me is whether the changes here affect the release toolflow. @lhstrh can you comment on this and perhaps open an issue in the workflow repo?

There might be some issue, but those will surface once I create a draft PR. This should not be a reason to hold up this PR and would only amount to changes required in the release-tools repo.