Update install script to support Windows

Author: ajeetdsouza

README.md

@@ -131,6 +131,12 @@ zoxide can be installed in 4 easy steps:
    > | [Chocolatey]    | `choco install zoxide`                |
    > | [conda-forge]   | `conda install -c conda-forge zoxide` |
    > | [Scoop]         | `scoop install zoxide`                |
+   >
+   > If you're using Cygwin, Git Bash, or MSYS2, use the install script instead:
+   >
+   > ```sh
+   > curl -sS https://raw.githubusercontent.com/ajeetdsouza/zoxide/main/install.sh | bash
+   > ```
 
    </details>
 

install.sh

@@ -55,6 +55,7 @@ main() {
     esac
     ensure mkdir -p "$_bin_dir"
     ensure cp "$_bin_name" "$_bin_dir"
+    ensure chmod +x "$_bin_dir/$_bin_name"
     echo "Installed zoxide to $_bin_dir"
 
     # Install manpages.