build(release): workspace 版本 0.1.0 → 0.2.0，README 的 tag 事实改成 v0.2.0 口径

- Cargo.toml [workspace.package] version = 0.2.0；Cargo.lock 由 cargo 重新解出一致
  （只有 8 个 unlucky-* 成员条目变动，第三方版本一字未动）
- 各 crate 的 `unlucky-*` path 依赖 `version = "0.1"` 同步提到 "0.2"，否则工作区
  根本解析不出来（cargo metadata 会报 `failed to select a version for
  unlucky-core = "^0.1"`）；crates/app 虽被 exclude、cargo 不读，也一并跟上避免将来
  重新纳入时立刻解析失败
- core::launch::LauncherConfig 兜底的 launcher_version 改成 env!("CARGO_PKG_VERSION")，
  不再是把版本写死一份（CLI / presenter 本来就这么写）
- README.md / README.zh-CN.md：删掉「v0.1.0 是目前唯一的 tag / the only tagged release」
  这类随 v0.2.0 发布即变假的陈述，改写成「v0.1.0 是最后一个 Slint 版 tag，v0.2.0 是
  重写后的第一个 tag」；所有讲 v0.1.0 资产 / Slint Royalty-Free 义务的历史记录原样保留
- packaging/README.md：命名与校验示例跟当前 tag 走（v0.2.0）；§7 实测记录里的 0.1.0
  输出加一句「属实测记录、不回填」，并把过期的「四个 workspace member」改成「任何一个」

Cargo.lock

@@ -4982,7 +4982,7 @@ checksum = "ca718471876992059f251e33aafc334346ada08042b7661dd1fe313a9bced557"
 
 [[package]]
 name = "unlucky-agent"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "axum",
  "futures-util",
@@ -4997,7 +4997,7 @@ dependencies = [
 
 [[package]]
 name = "unlucky-app-iced"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "iced",
  "image",
@@ -5010,7 +5010,7 @@ dependencies = [
 
 [[package]]
 name = "unlucky-cli"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "serde",
  "serde_json",
@@ -5021,7 +5021,7 @@ dependencies = [
 
 [[package]]
 name = "unlucky-core"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "flate2",
  "futures-util",
@@ -5040,15 +5040,15 @@ dependencies = [
 
 [[package]]
 name = "unlucky-design"
-version = "0.1.0"
+version = "0.2.0"
 
 [[package]]
 name = "unlucky-i18n"
-version = "0.1.0"
+version = "0.2.0"
 
 [[package]]
 name = "unlucky-palette-extract"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "image",
  "unlucky-design",
@@ -5056,7 +5056,7 @@ dependencies = [
 
 [[package]]
 name = "unlucky-presenter"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "serde",
  "serde_json",