dot: 重构 bashrc.d 目录结构，调整版本（包）管理器脚本加载顺序

- 将 mise、rust 等管理器脚本移入 manager/ 子目录，与工具脚本区分
- mise/volta 的补全改到各自 activate 函数内延迟生成，避免未激活时执行
- 新增 uv/uvx 的 bash 补全
- .bashrc 拆分为先加载 manager/ 再加载顶层脚本的两段流程
- .xprofile 改用 bash 解释并复用相同的脚本加载流程

dot/.bashrc.d/manager/mise.bash

@@ -0,0 +1,27 @@
+basedir=$(realpath -m $(dirname "${BASH_SOURCE[0]:-$0}"))
+source "${basedir}/../function.bash"
+
+unset basedir
+
+if [[ -x $(type -p mise) ]]; then
+    mise-activate() {
+        eval "$(mise activate bash)"
+
+        local completion_cmd="mise completion --include-bash-completion-lib bash"
+        generate-bash-completion mise "$completion_cmd"
+    }
+
+    mise-deactivate() {
+        mise deactivate
+
+        if [[ "$(type -p cd)" == "function" ]]; then
+            unset cd
+        fi
+
+        local all_mise=$(compgen -v | grep -i '_mise')
+        local mise
+        for mise in $all_mise; do
+            unset "$mise"
+        done
+    }
+fi

dot/.bashrc.d/manager/rust.bash

@@ -0,0 +1,17 @@
+basedir=$(realpath -m $(dirname "${BASH_SOURCE[0]:-$0}"))
+source "${basedir}/../function.bash"
+
+unset basedir
+
+if [[ -d "${HOME}/.cargo/bin" ]]; then
+    add-to-path "${HOME}/.cargo/bin"
+fi
+
+if [[ -e "${HOME}/.cargo/env" ]]; then
+    . "${HOME}/.cargo/env"
+fi
+
+if [[ -x "$(type -p rustup)" ]]; then
+    generate-bash-completion rustup "rustup completions bash cargo"
+    generate-bash-completion cargo "rustup completions bash cargo"
+fi