vscode devcontainer (#3474)

* Added devcontainer configuration files

* Added launch.json and improved devcontainer

* Added tasks.json

* fix: lint

* fix: lint

* Applied suggestions from codereview

* Added more system dependencies and preserve history

* devcontainer updates

- Add extra environment variables for InvenTree config
- Move venv into dev directory (cleaner structure)
- Ensure base package requirements get installed
- Handle write-permission error for compiling translations
- Install test data inside dev directory

* Auto create plugin dir and added gh cli

* Refactored postCreateCommand into own file

* Applied suggestions from codereview

Co-authored-by: Oliver Walters <oliver.henry.walters@gmail.com>

.devcontainer/postCreateCommand.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# create folders
+mkdir -p /workspaces/InvenTree/dev/{commandhistory,plugins}
+cd /workspaces/InvenTree
+
+# create venv
+python3 -m venv dev/venv
+. dev/venv/bin/activate
+
+# setup inventree server
+pip install invoke
+inv update
+inv setup-dev