This PR copies the templates in coder/coder/examples/templates over to
the registry, so that template contribution can be done through the
registry.
For now, the starter templates in the coder/coder binary and the
templates available in coder/registry will simply be different
constructs, until we find a solution we like around a single source of
truth for templates that doesn't raise hairy semver concerns for
coder/coder:
https://codercom.slack.com/archives/C05T7165ET1/p1749493368773469
## Changes made
- Added back CI steps for validating the codebase for typos and formatting
- Updated README validation CI step to be dependent on typo-checking step
- Updated configuration files as needed to support the new CI step
- Updated all files that were previously getting skipped over from improperly-set-up CI logic
More work towards closing https://github.com/coder/internal/issues/532
## Changes made
- Added Bash script to run `terraform validate` on all relevant repos
- Updated `package.json` and CI to use the script
