fix: add rules_cc 0.2.0 compatibility for downstream consumers

- Add compatibility_proxy_repo() extension required by rules_cc 0.2.0
- Fixes C++ toolchain resolution failures in downstream repositories
- Resolves Issue #75 where file_operations_component toolchain caused
  'No matching toolchains found for types: @@bazel_tools//tools/cpp:toolchain_type'
- Follows official rules_cc 0.2.0 bzlmod migration guide
- Maintains compatibility with latest dependency versions:
  - rules_cc: 0.2.0, platforms: 1.0.0, bazel_skylib: 1.8.1

Tested: file_operations_component builds successfully with fresh cache

Author: avrabe

MODULE.bazel

@@ -111,6 +111,10 @@ use_repo(wasi_sdk, "wasi_sdk")
 cc_configure = use_extension("@rules_cc//cc:extensions.bzl", "cc_configure")
 use_repo(cc_configure, "local_config_cc")
 
+# Add compatibility proxy repository for rules_cc 0.2.0 (required for bzlmod)
+cc_compatibility = use_extension("@rules_cc//cc:extensions.bzl", "compatibility_proxy_repo") 
+cc_compatibility.compatibility_proxy_repo()
+
 # Register both WASI SDK and C++ toolchains  
 register_toolchains(
     "@wasi_sdk//:wasi_sdk_toolchain",