release: bump version to 3.3.0

Update version across all package files and add comprehensive changelog for v3.3.0 release featuring VS Code integration, shared config snippets, enhanced Codex wizard, and cross-platform improvements.

src-tauri/Cargo.lock

@@ -580,7 +580,7 @@ dependencies = [
 
 [[package]]
 name = "cc-switch"
-version = "3.2.0"
+version = "3.3.0"
 dependencies = [
  "dirs 5.0.1",
  "log",

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cc-switch"
-version = "3.2.0"
+version = "3.3.0"
 description = "Claude Code & Codex 供应商配置管理工具"
 authors = ["Jason Young"]
 license = "MIT"

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "CC Switch",
-  "version": "3.2.0",
+  "version": "3.3.0",
   "identifier": "com.ccswitch.desktop",
   "build": {
     "frontendDist": "../dist",