Fix issue where typescript error is shown in recipes when exactOptionalPropertyTypes is set.

To learn more about this issue, see this issue
Fix issue in preflight where monospace fallback pointed to the wrong variable
Fix issue where css variables were not supported in layer styles and text styles types.
Fix issue where recipe artifacts might not match the recipes defined in the theme due to the internal cache not being cleared as needed.

Changed

Require explicit installation of @pandacss/studio to use the panda studio command.
Improves the config.strictTokens type-safety by allowing CSS predefined values (like 'flex' or 'block' for the property 'display') and throwing when using anything else than those, if no theme tokens was found on that property.

Before:

// config.strictTokens = true
css({ display: 'flex' }) // OK, didn't throw
css({ display: 'block' }) // OK, didn't throw
css({ display: 'abc' }) // ❌ didn't throw even though 'abc' is not a valid value for 'display'

Now:

// config.strictTokens = true
css({ display: 'flex' }) // OK, didn't throw
css({ display: 'block' }) // OK, didn't throw
css({ display: 'abc' }) // ✅ will throw since 'abc' is not a valid value for 'display'