Add CLI support to list available presets for a template version and to create a workspace using a specific preset.

Command suggestions:

• List presets for a template version:

coder templates versions presets list \
  --template <template-name> \
  --template-version <version-name>

• Create a workspace using a preset:

coder create \
  --template <template-name> \
  --template-version <version-name> \
  --preset <preset-name>

When no --preset is provided, the default preset for the template version should be used.