Add support for protoc and grpc_php_plugin

src/scripts/tools/protoc.ps1

@@ -0,0 +1,38 @@
+Function Get-ProtobufTag() {
+  if("$protobuf_tag" -eq "latest") {
+    $protobuf_tag = (Invoke-RestMethod https://api.github.com/repos/protocolbuffers/protobuf/tags).Name | Where-Object { $_ -match "v\d+.\d+.\d+$" } | Select-Object -First 1
+  } else {
+    try {
+      [net.httpWebRequest] $request = [net.webRequest]::create("https://github.com/protocolbuffers/protobuf/releases/tag/v$protobuf_tag")
+      $req.Method = "HEAD"
+      [net.httpWebResponse] $response = $request.getResponse()
+      $response.Close()
+      $protobuf_tag = "v$protobuf_tag"
+    } catch {
+      $protobuf_tag = (Invoke-RestMethod https://api.github.com/repos/protocolbuffers/protobuf/tags).Name | Where-Object { $_ -match "v\d+.\d+.\d+$" } | Select-Object -First 1
+    }
+  }
+  return $protobuf_tag
+}
+
+Function Add-Protoc() {
+  param(
+    [Parameter(Mandatory = $true, Position = 0, HelpMessage = 'The PHP version to be installed')]
+    [ValidatePattern('^latest$|^(v?)\d+\.\d+\.\d+$')]
+    [string] $protobuf_tag
+  )
+  $protobuf_tag = Get-ProtobufTag
+  $arch_num = '64'
+  if(-not([Environment]::Is64BitOperatingSystem)) {
+    $arch_num = '32'
+  }
+  $url = "https://github.com/protocolbuffers/protobuf/releases/download/$protobuf_tag/protoc-$($protobuf_tag -replace 'v', '')-win$arch_num.zip"
+  Invoke-WebRequest -UseBasicParsing -Uri $url -OutFile $bin_dir\protoc.zip >$null 2>&1
+  Expand-Archive -Path $bin_dir\protoc.zip -DestinationPath $bin_dir\protoc -Force >$null 2>&1
+  Move-Item -Path $bin_dir\protoc\bin\protoc.exe -Destination $bin_dir\protoc.exe
+  Add-ToProfile $current_profile 'protoc' "New-Alias protoc $bin_dir\protoc.exe"
+  Add-Log $tick "protoc" "Added"
+  printf "::group::\033[34;1m%s \033[0m\033[90;1m%s \033[0m\n" "protoc" "Click to read the protoc related license information"
+  Write-Output (Invoke-WebRequest https://raw.githubusercontent.com/protocolbuffers/protobuf/master/LICENSE).Content
+  Write-Output "::endgroup::"
+}