Enable elixir-ls / elixir_sense intellisense for ASH DSLs

ash_intellisense.bash

# Get intellisense working with the Ash Framework DSL in VSCode
# on MacOS using the asdf version manager

git clone https://github.com/elixir-lsp/vscode-elixir-ls.git
cd vscode-elixir-ls

# Update elixir_sense to the latest version and get dependencies
git submodule init
git submodule update --remote
cd elixir-ls
asdf install
mix deps.get

# Build the extension
cd ..
npm install
npx vsce package
code --install-extension *.vsix --force

# Open VSCode, and then restart again
# Wait for compilation to finish, you can monitor progress in the ElixirLS Output panel