Fix IntelliSense class suggestions (#15857)

This PR fixes a few problems with IntelliSense:
- Default installs suggest font weight utilities twice
- When setting `--font-weight-*: initial;` the default weights are still
suggested
- Setting `--spacing-*: initial;` still shows suggestions for utilities
using the spacing scale assuming it's multiplier-based. Removing the
`--spacing: …` key should make them entirely theme driven instead.
- The default container query variants like `@sm`, `@md`, etc… aren't
suggested. Only the `@min-sm` and `@max-sm` style ones are.

Fixes
tailwindlabs/tailwindcss-intellisense#1133
Fixes
tailwindlabs/tailwindcss-intellisense#1136
Fixes #15811

---------

Co-authored-by: Robin Malfait <malfait.robin@gmail.com>

CHANGELOG.md

@@ -17,6 +17,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Ensure CSS variable shorthand uses valid CSS variables ([#15738](https://github.com/tailwindlabs/tailwindcss/pull/15738))
 - Ensure font-size utilities with `none` modifier have a line-height set e.g.: `text-sm/none` ([#15921](https://github.com/tailwindlabs/tailwindcss/pull/15921))
 - Ensure font-size utilities with unknown modifier don't generate CSS ([#15921](https://github.com/tailwindlabs/tailwindcss/pull/15921))
+- Don’t suggest font weight utilities more than once ([#15857](https://github.com/tailwindlabs/tailwindcss/pull/15857))
+- Suggest container query variants ([#15857](https://github.com/tailwindlabs/tailwindcss/pull/15857))
+- Disable bare value suggestions when not using the `--spacing` variable ([#15857](https://github.com/tailwindlabs/tailwindcss/pull/15857))
+- Ensure suggested classes are properly sorted ([#15857](https://github.com/tailwindlabs/tailwindcss/pull/15857))
 - _Upgrade_: Ensure JavaScript config files on different drives are correctly migrated ([#15927](https://github.com/tailwindlabs/tailwindcss/pull/15927))
 
 ## [4.0.0] - 2025-01-21