refactor(Mountain/gRPC): Restructure Vine IPC code generation

- Moved `Proto2/Vine.proto` to `Proto/Vine.proto` and removed header comments
- Deleted old gRPC build script (`Proto2/Build.rs`) and generated module (`Source/Vine/Generated.rs`)
- Added new generated files using `prost` output: `vine_ipc.rs` and updated `mod.rs`
- Integrated gRPC compilation into main `build.rs` using `tonic-build`
- Added required dependencies (`tonic-build`, `prost`) to `Cargo.toml`

This refactor aligns with Land's final architecture by:
1. Standardizing the IPC layer (`Vine`) directory structure
2. Switching to `prost` for Protocol Buffers implementation (used in `tonic`)
3. Consolidating build processes - Tauri version embedding and gRPC generation now coexist in `build.rs`
4. Improving maintainability through proper error propagation in build scripts

The changes ensure robust gRPC communication between `Mountain` and `Cocoon`, critical for implemented workflows like extension hosting, file operations, and command execution. Generated code structure follows Rust best practices with explicit module inclusion.

Author: NikolaRHristov

Cargo.toml

@@ -9,6 +9,7 @@ serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
 tauri-build = { workspace = true, features = [] }
 toml = { workspace = true }
+tonic-build = { workspace = true }
 
 [dependencies]
 tauri = { version = "*", features = [
@@ -50,6 +51,7 @@ uuid = { workspace = true, features = ["v4", "serde"] }
 parking_lot = { workspace = true }
 lazy_static = { workspace = true }
 portable-pty = { workspace = true }
+prost = { workspace = true }
 
 # regex = { workspace = true }
 # unbug = { workspace = true }

Proto2/Vine.proto Proto/Vine.protoProto2/Vine.proto renamed to Proto/Vine.proto

@@ -1,6 +1,3 @@
-// @file vine.proto
-// @brief Defines the gRPC services and messages for communication between Mountain (host) and Cocoon (sidecar).
-
 syntax = "proto3";
 
 package vine_ipc;

Proto2/Build.rs

@@ -0,0 +1,17 @@
+//! # Vine Generated Code
+//!
+//! This module includes and re-exports the Rust code that is automatically
+//! generated by `tonic-build` from the `Vine.proto` definition file. It serves
+//! as the single source of truth for all gRPC message types, service traits,
+//! and client/server structs. Do not edit this file directly.
+
+#![allow(
+	non_snake_case,
+	non_camel_case_types,
+	clippy::all,
+	unused_imports,
+	unknown_lints,
+	non_shorthand_field_patterns
+)]
+
+include!("vine_ipc.rs");