kernel: Add pure kernel bitcoin-chainstate

Re-write the bitcoin-chainstate utility by only using the kernel C++ API
header instead of internal Bitcoin Core code.

test/lint/test_runner/src/main.rs

@@ -374,6 +374,7 @@ fn lint_std_filesystem() -> LintResult {
             ":(exclude)src/ipc/libmultiprocess/",
             ":(exclude)src/util/fs.h",
             ":(exclude)src/test/kernel/test_kernel.cpp",
+            ":(exclude)src/bitcoin-chainstate.cpp",
         ])
         .status()
         .expect("command error")