build(config): add optimized Cargo release profile configuration

- Set `target-dir` to "Target" to centralize build artifacts
- Configure release profile with maximum optimizations:
  - LTO enabled for cross-crate optimizations
  - Codegen units reduced to 1 for better optimization
  - Panic strategy set to abort for smaller binaries
  - Strip symbols and disable debug info in release builds
- Enforce git VCS for new crate initialization

These changes align with Land's core performance objectives by:
1. Reducing final binary size through stripping and panic abort
2. Improving runtime performance via aggressive LTO and opt-level 3
3. Establishing consistent build artifact management
4. Ensuring clean project initialization practices

Particularly critical for the Mountain (Rust backend) component where release build efficiency directly impacts application startup time and memory footprint versus Electron baseline.

Author: NikolaRHristov

.cargo/config.toml

@@ -0,0 +1,13 @@
+[build]
+target-dir = "Target"
+
+[cargo-new]
+vcs = "git"
+
+[profile.release]
+opt-level = 3
+codegen-units = 1
+debug = false
+lto = true
+panic = "abort"
+strip = true