Adding all files to Cmd line is no longer necessary -> The filename or extension is too long

[FreCap]

https://github.com/leinardi/mypy-pycharm/blob/50bd2b683c5825cd7e6ddbc6f47c3ed39b14b0ba/src/main/java/com/leinardi/pycharm/mypy/mpapi/MypyRunner.java#L251

As https://github.com/python/mypy/issues/4008#issuecomment-417862464, now mypy should accepts also a directory and search files recursively.

Would it possible to to not have the the recursive scanning of files?

Concatenating all of my file creates an argument length of over 100KB and makes mypy-pycharm crash with

2021-01-27 16:37:44,692 [1035917909]   WARN - pycharm.mypy.checker.ScanFiles - An error occurred while scanning a file. 
com.leinardi.pycharm.mypy.exception.MypyToolException: Error creating Mypy process
	at com.leinardi.pycharm.mypy.mpapi.MypyRunner.runMypy(MypyRunner.java:318)
	at com.leinardi.pycharm.mypy.mpapi.MypyRunner.scan(MypyRunner.java:265)
	at com.leinardi.pycharm.mypy.checker.ScanFiles.scan(ScanFiles.java:109)
	at com.leinardi.pycharm.mypy.checker.ScanFiles.checkFiles(ScanFiles.java:100)
	at com.leinardi.pycharm.mypy.checker.ScanFiles.call(ScanFiles.java:74)
	at com.leinardi.pycharm.mypy.checker.ScanFiles.call(ScanFiles.java:46)
	at com.intellij.openapi.application.impl.ApplicationImpl$1.call(ApplicationImpl.java:270)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: com.intellij.execution.process.ProcessNotCreatedException: Cannot run program ""*****Scripts\dmypy.exe" (in directory ""*****service"): CreateProcess error=206, The filename or extension is too long
	at com.intellij.execution.configurations.GeneralCommandLine.createProcess(GeneralCommandLine.java:380)
	at com.leinardi.pycharm.mypy.mpapi.MypyRunner.runMypy(MypyRunner.java:305)
	... 14 more
Caused by: java.io.IOException: Cannot run program "*****Scripts\dmypy.exe" (in directory ""*****\service"): CreateProcess error=206, The filename or extension is too long
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1128)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1071)
	at com.intellij.execution.configurations.GeneralCommandLine.startProcess(GeneralCommandLine.java:453)
	at com.intellij.execution.configurations.GeneralCommandLine.createProcess(GeneralCommandLine.java:376)
	... 15 more
Caused by: java.io.IOException: CreateProcess error=206, The filename or extension is too long
	at java.base/java.lang.ProcessImpl.create(Native Method)
	at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:478)
	at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:154)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1107)
	... 18 more