docs: update the instructions to use the platform independent v download command (#140)

Author: spytheman

.github/workflows/install_ci.yml

@@ -25,11 +25,11 @@ jobs:
 
       - name: Install via webscript (Windows)
         if: runner.os == 'Windows'
-        run: curl -o install.vsh https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v run install.vsh; del install.vsh
+        run: v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v run install.vsh; del install.vsh
 
       - name: Install via webscript (nix)
         if: runner.os != 'Windows'
-        run: v -e "$(curl https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh -fsSL)"
+        run: v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v run install.vsh; rm -rf install.vsh
 
       - name: Verify installation success
         run: ~/.config/v-analyzer/bin/v-analyzer --version

README.md

@@ -26,25 +26,19 @@ The features provided by v-analyzer include:
 
 ### Linux and macOS
 
-```sh
-v -e "$(curl -fsSL https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh)"
+```sh 
+v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v run 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
-
-```sh
-curl -o install.vsh https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v run install.vsh; del install.vsh
-```
-
-#### Command shell
+#### Powershell && Command shell
 
 ```sh
-curl -o install.vsh https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh && v run install.vsh && del install.vsh
+v download https://raw.githubusercontent.com/vlang/v-analyzer/main/install.vsh; v run install.vsh; del install.vsh
 ```
 
 ## Pre-built binaries