Adds ansi_escapes.

Adds minimal WORKSPACE.

BUILD

@@ -0,0 +1,22 @@
+load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "ansi_escapes",
+    srcs = ["ansi_escapes.cpp"],
+    hdrs = ["ansi_escapes.h"],
+    includes = ["ansi_escapes.h"],
+)
+
+cc_test(
+    name = "ansi_escapes_test",
+    srcs = ["ansi_escapes_test.cpp"],
+    deps = [
+        ":ansi_escapes",
+        "@tinytest",
+    ],
+)
+