Protobuf/Buf Formatter Fails for Files Larger than 64KiB

Test case:

1. Define a .proto files larger than 64 KiB (or your platform's pipe buffer limit). Padding with whitespace should also work.
2. Configure spotless to format said file.
3. Run spotlessApply (gradle example).

Expected behavior:

Formatting runs and passes (if valid proto file).

Actual behavior:

```
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':treatment:api:spotlessProtobufApply'.
...
Caused by: org.gradle.api.GradleException: There were 1 lint error(s), they must be fixed or suppressed.
src/...:LINE_UNDEFINED buf(java.io.IOException) Broken pipe (...)
Resolve these lints or suppress with `suppressLintsFor`
at com.diffplug.gradle.spotless.SpotlessApply.performAction(SpotlessApply.java:60)
```

`cat`-ing `/build/spotless-lints/...` shows:
```
Broken pipe
at java.base/java.io.FileOutputStream.writeBytes(Native Method)
at java.base/java.io.FileOutputStream.write(FileOutputStream.java:367)
at java.base/java.io.BufferedOutputStream.implWrite(BufferedOutputStream.java:217)
at java.base/java.io.BufferedOutputStream.write(BufferedOutputStream.java:206)
at java.base/java.io.FilterOutputStream.write(FilterOutputStream.java:110)
at com.diffplug.spotless.ProcessRunner.start(ProcessRunner.java:165)
at com.diffplug.spotless.ProcessRunner.start(ProcessRunner.java:131)
at com.diffplug.spotless.ProcessRunner.exec(ProcessRunner.java:114)
at com.diffplug.spotless.ProcessRunner.exec(ProcessRunner.java:109)
at com.diffplug.spotless.protobuf.BufStep$State.format(BufStep.java:109)
at com.diffplug.spotless.FormatterFunc$Closeable$3.apply(FormatterFunc.java:140)
at com.diffplug.spotless.FormatterStepEqualityOnStateSerialization.format(FormatterStepEqualityOnStateSerialization.java:49)
at com.diffplug.spotless.LintState.of(LintState.java:177)
at com.diffplug.spotless.LintState.of(LintState.java:134)
at com.diffplug.gradle.spotless.SpotlessTaskImpl.processInputFile(SpotlessTaskImpl.java:134)
at com.diffplug.gradle.spotless.SpotlessTaskImpl.performAction(SpotlessTaskImpl.java:117)
...
```

Riproduci il problema con un file .proto valido di dimensioni superiori a 64 KiB ed esegui spotlessApply. Inizia leggendo ProcessRunner.start e il punto di chiamata BufStep.java:109 mostrato nel trace; il lavoro è completato quando la formattazione termina senza un lint Broken pipe e l’output generato rimane valido.

Scritto dal modello di indicizzazione a partire dal testo della issue.