add connlib rust logic.

This commit convert this repo into a rust workspace.
Divides into 2 types of crates, libs/clients.
Clients are thin wrappers used directly by native clients.
Libs implement the logic.
We have 4 logic crates:
- Gateway: Gateway-specific logic.
- Clients: Client-specific logic.
- Tunnel: General logic for wireguard/ice tunnels.
- Common: Types shared by all crates.

.gitignore

@@ -1,13 +1,12 @@
 ### Rust ###
-/target
+target/
 # Libraries shouldn't lock their dependencies
-/Cargo.lock
+Cargo.lock
 
 ### Android ###
 # Gradle files
 .gradle/
 build/
-android/target/
 
 # Local configuration file (sdk path, etc)
 local.properties
@@ -101,11 +100,10 @@ proguard/
 # Log Files
 
 # Android Studio
-/*/build/
+build/
 /*/local.properties
-/*/out
-/*/*/build
-/*/*/production
+out/
+production/
 .navigation/
 *.ipr
 *~
@@ -126,7 +124,6 @@ obj/
 
 # IntelliJ IDEA
 *.iws
-/out/
 
 # User-specific configurations
 .idea/caches/
@@ -172,9 +169,8 @@ fabric.properties
 ### Apple ###
 .DS_Store
 .build/
-build/
 DerivedData/
 xcuserdata/
-**/*.xcuserstate
+*.xcuserstate
 
 Firezone/Developer.xcconfig

Cargo.toml

@@ -1,24 +1,11 @@
-[package]
-name = "firezone-connlib"
-version = "0.1.6"
-edition = "2021"
-
-[dependencies]
-# Apple tunnel dependencies
-[target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
-boringtun = { git = "https://github.com/cloudflare/boringtun", rev = "878385f", features = ["device"] }
-
-# Linux tunnel dependencies
-[target.'cfg(target_os = "linux")'.dependencies]
-boringtun = { git = "https://github.com/cloudflare/boringtun", rev = "878385f", features = ["device"] }
-
-# Android tunnel dependencies
-[target.'cfg(target_os = "android")'.dependencies]
-boringtun = { git = "https://github.com/cloudflare/boringtun", rev = "878385f", features = ["jni-bindings"] }
-android_logger = "0.13"
-log = "0.4.14"
-
-# Windows tunnel dependencies
-[target.'cfg(target_os = "windows")'.dependencies]
-boringtun = { git = "https://github.com/cloudflare/boringtun", rev = "878385f" }
-wintun = "0.2.1"
+[workspace]
+members = [
+  "clients/android",
+  "clients/apple",
+  "libs/tunnel",
+  "libs/client",
+  "libs/gateway",
+  "libs/common",
+  "gateway",
+  "macros",
+]