Add VS Code packaging ignore rules

Author: s1korrrr

.vscodeignore

@@ -0,0 +1,21 @@
+.github/**
+.vscode/**
+SwiftExplorerApp/**
+node_modules/.bin/**
+assets/icon.jpg
+AGENTS.md
+PLAN.md
+TODO.md
+MEMORY.md
+INSTALL.md
+CODE_OF_CONDUCT.md
+CONTRIBUTING.md
+SECURITY.md
+.editorconfig
+.eslintrc.cjs
+.prettierignore
+.prettierrc
+.swiftformat
+package-lock.json
+test/**
+*.vsix