Fix bisect script run and level validators

app/src/main/java/solutions/tretter/githugandroid/CompletionCandidates.kt

@@ -24,6 +24,27 @@ internal fun directoryCompletionCandidates(repo: RepoState): List<String> {
         .distinct()
 }
 
+internal fun contextualCompletionCandidates(
+    candidates: List<String>,
+    commandBeforeToken: String,
+    token: String,
+    directoriesOnly: Boolean,
+): List<String> {
+    val matches = candidates.sorted().filter { it.startsWith(token) }
+    if (directoriesOnly) return matches
+
+    val commandTokens = GitSandboxEngine.tokenizeCommand(commandBeforeToken.trim())
+    if (commandTokens == listOf("git", "bisect", "run")) {
+        val scriptMatches = matches.filter { candidate ->
+            val normalized = candidate.removePrefix("./")
+            normalized.endsWith(".sh") && '/' !in normalized && !normalized.startsWith(".")
+        }
+        if (scriptMatches.isNotEmpty()) return scriptMatches
+    }
+
+    return matches
+}
+
 private fun RepoState.currentDirPrefix(): String {
     return if (currentDir == ".") "" else currentDir.trimEnd('/') + "/"
 }