feat(Mountain/Vine): Add ProtoValueConverter utility module for IPC data serialization

- Introduces `ProtoValueConverter` module to handle conversions between `serde_json::Value` and Protocol Buffers' `Value` type
- Enables type-safe data interchange between `Mountain` backend and sidecar processes via `Vine` IPC layer
- Facilitates efficient serialization/deserialization for cross-language RPC calls (Rust <-> JS in `Cocoon`)
- Supports MVP Path A extension communication by ensuring compatibility with VS Code extension protocol requirements
- Part of foundational work for `Vine` IPC system that will also benefit future `Grove` native host development

Author: NikolaRHristov

Source/Ipc/Util/mod.rs

@@ -0,0 +1,11 @@
+// File: Ipc/Util/mod.rs
+// Declares and exports utility modules for the IPC system.
+
+#![allow(non_snake_case, non_camel_case_types)]
+
+// This module contains helper functions for converting between
+// `serde_json::Value` and `google.protobuf.Value`.
+mod ProtoValueConverter;
+
+// Re-export all public items from the converter module.
+pub use self::ProtoValueConverter::*;