feat(devcontainer): add devcontainer references here and in clustertool templates

.devcontainer/postCreateCommand.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -e
+set -o noglob
+
+# Setup fisher plugin manager for fish and install plugins
+/usr/bin/fish -c "
+curl -sL https://git.io/fisher | source && fisher install jorgebucaran/fisher
+fisher install decors/fish-colored-man
+fisher install edc/bass
+fisher install jorgebucaran/autopair.fish
+fisher install nickeb96/puffer-fish
+fisher install PatrickF1/fzf.fish
+"
+
+# Create/update virtual environment
+if ! grep -q "venv /workspaces/" .venv/pyvenv.cfg; then
+    rm -rf .venv
+fi
+task workstation:venv