feat: ensure related go source and vscode plugins are installed in devcontainer

.devcontainer/bin/copy-plugin

@@ -3,7 +3,7 @@
 main() {
   declare PLUGIN_NAME="$1"
 
-  make go-build-plugin copyplugin PLUGIN_NAME=$PLUGIN_NAME
+  make go-build-plugin copyplugin PLUGIN_NAME=$PLUGIN_NAME PLUGIN_MAKE_TARGET=build
 }
 
 main "$@"

.devcontainer/bin/go-mod-downloadall

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -x
+
+main() {
+  find plugins/ -mindepth 1 -maxdepth 1 -type d -printf '%f\n' | while read plugin; do
+    if [[ ! -f "plugins/$plugin/go.mod" ]]; then
+      continue
+    fi
+
+    pushd "plugins/$plugin" >/dev/null || return 1
+    echo "====> Cloning all modules $plugin"
+    go list -m -f '{{define "M"}}git clone https://{{.Path}}.git /root/go/src/{{.Path}} || true && echo {{.Version}}{{end}}{{if not .Main}}{{if not .Replace}}{{template "M" .}}{{end}}{{end}}' all >tmp-file
+    bash tmp-file
+    rm tmp-file
+
+    go list -m -f '{{define "M"}}git clone https://{{.Path}}.git /usr/local/go/src/{{.Path}} || true && echo {{.Version}}{{end}}{{if not .Main}}{{if not .Replace}}{{template "M" .}}{{end}}{{end}}' all >tmp-file
+    bash tmp-file
+    rm tmp-file
+    popd >/dev/null || return 1
+  done
+}
+
+main "$@"