Move native level setups into level files

- Delete NativeLevelFixtures.kt and make native repository setup an optional property of each Level.
- Move every existing native setup into its corresponding level file so setup, validation, and tests stay together.
- Add the missing Blame native setup with config.rb history and a Spider Man password commit.
- Add a native runtime regression that verifies `git blame config.rb` identifies Spider Man on the password line.
- Verify the full JVM test suite using the compiled host Git runtime.

app/src/main/java/solutions/tretter/githugandroid/levels/ResetLevel.kt

@@ -14,6 +14,15 @@ internal fun resetLevel(): Level = level(
     hints = listOf("git status will tell you the command you need to run."),
     commandSuggestions = listOf("git reset to_commit_second.rb"),
     setup = { RepoState(initialized = true, files = listOf(GitFile("to_commit_first.rb", staged = true), GitFile("to_commit_second.rb", staged = true), GitFile("README", tracked = true)), commits = listOf(CommitNode("0000001", "Initial commit")), branches = mapOf("master" to 1)) },
+    nativeSetup = {
+        resetFiles()
+        write("README")
+        addCommit("Initial commit", "README")
+        write("to_commit_first.rb")
+        write("to_commit_second.rb")
+        add("to_commit_first.rb", "to_commit_second.rb")
+        true
+    },
     validator = repoPredicate { repo -> repo.commits.size == 1 && repo.files.any { it.name == "to_commit_first.rb" && it.staged } && repo.files.any { it.name == "to_commit_second.rb" && !it.staged } },
     testCases = listOf(
         levelTestCase("reset path", "git reset to_commit_second.rb"),