Since we enable global-company-mode, explicitly enabling it in the setup
for various major modes does nothing. But it does tie the code to
company mode, making it harder to try alternatives like corfu.
Ensure language servers only start when a buffer is visible. This helps
with desktop restore speed, as various language servers do not start all
at the same time.
- Switch from highlight-indentation package to highlight-indent-guides.
- Activate visual indentation in a prog-mode hook, rather than doing
within each individual major mode. It was already done within all
major modes based on prog-mode anyway.
- Add new siren-display-indetation module and function as a central way
to enable visual indetation guides. This makes switching the
underlying package at some point in the future much easier.
