Proper streams closure after running cmd in JavaScript

[rudolf101]

Description

Figure out how to properly close input and error stream after running cmd.
Currently, the closure of the streams is not controlled, which can lead to a loss of resources.

To Reproduce

1. Open utbot-js/../utils/JsCmdExec.kt
2. Go to usages of runCommand function
3. Look at the operations with the returned bufferReader

Expected behavior

After executing the cmd command, the inputStream and errorStream text should be obtained, both streams should be closed properly.

Actual behavior

The closure of streams is not controlled properly.

Potential problem solution

Close the streams in runCommand function and return a Pair<String, String>

fun runCommand(
        dir: String? = null,
        shouldWait: Boolean = false,
        timeout: Long = defaultTimeout,
        vararg cmd: String,
    ): Pair<String, String> {
        val builder = ProcessBuilder(*OsProvider.getProviderByOs().getCmdPrefix(), *cmd)
        dir?.let {
            builder.directory(File(it))
        }
        val process = builder.start()
        if (shouldWait) {
            if (!process.waitFor(timeout, TimeUnit.SECONDS)) {
                process.descendants().forEach {
                    it.destroy()
                }
                process.destroy()
                throw TimeoutException("")
            }
        }
        return Pair(
            process.inputStream.bufferedReader().use { it.readText() },
            process.errorStream.bufferedReader().use { it.readText() }
        )
    }