install, docs: use a single v download -RD https://raw.githubusercon…

…tent.com/vlang/v-analyzer/main/install.vsh` command on all platforms

.github/workflows/install_ci.yml

@@ -23,13 +23,8 @@ jobs:
         with:
           check-latest: true
 
-      - name: Install via webscript (Windows)
-        if: runner.os == 'Windows'
-        run: v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v install.vsh; del install.vsh
-
-      - name: Install via webscript (nix)
-        if: runner.os != 'Windows'
-        run: v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v install.vsh; rm -rf install.vsh
+      - name: Install via webscript
+        run: v download -RD https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh
 
       - name: Verify installation success
         run: ~/.config/v-analyzer/bin/v-analyzer --version

README.md

@@ -24,21 +24,14 @@ The features provided by v-analyzer include:
 
 ## Installation
 
-### Linux and macOS
+### Linux, macOS, Windows
+Note: the following command will download `install.vsh` to the current directory, then 
+run it, and then *delete it*. If there is a pre-existing file with this name, make sure it
+is safe, when it is overwritten/deleted, or change the current directory (the script itself
+can be run from anywhere).
 
 ```sh 
-v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v install.vsh; rm install.vsh
-```
-
-### Windows
-
-The `install.vsh` file is downloaded to the current directory and stored there temporarily.
-If there is another file with this name, make sure it is safe when it is overwritten/deleted.
-
-#### Powershell && Command shell
-
-```sh
-v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v install.vsh; del install.vsh
+v download -RD https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh
 ```
 
 ## Pre-built binaries