[bazel] MVP for building GUI related things with bazel (#7934)

Co-authored-by: David Vo <auscompgeek@users.noreply.github.com>

shared/bazel/rules/objectivec_rules.bzl

@@ -0,0 +1,37 @@
+load("@rules_cc//cc:defs.bzl", "objc_library")
+
+# These flags are added to match the current native-utils flags in https://github.com/wpilibsuite/native-utils/blob/d8555ca479438c9c08b4a2400a58f280fec90c3f/src/main/java/edu/wpi/first/nativeutils/WPINativeUtilsExtension.java
+OBJC_COMPILER_FLAGS = [
+    "-stdlib=libc++",
+    "-fPIC",
+]
+
+def wpilib_objc_library(
+        name,
+        srcs = [],
+        deps = [],
+        copts = None,
+        is_cpp = True,
+        include_arc = True,
+        **kwargs):
+    """
+    Helper macro for defining .
+
+    Args:
+        is_cpp: If this is a C++ library. Specifying this will add additional C++ specific compiler flags
+        include_arc: If true, this will add compiler flags for ARC (Automatic Reference Counting)
+    """
+    copts = copts or []
+    if is_cpp:
+        copts.append("-std=c++20")
+    if include_arc:
+        copts += ["-fobjc-weak", "-fobjc-arc"]
+
+    objc_library(
+        name = name,
+        srcs = srcs,
+        copts = copts + OBJC_COMPILER_FLAGS,
+        target_compatible_with = ["@platforms//os:osx"],
+        deps = deps,
+        **kwargs
+    )