chore(deps): update dependency postcss-cli to v12 (#8934)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [postcss-cli](https://redirect.github.com/postcss/postcss-cli) |
[`11.0.1` →
`12.0.0`](https://renovatebot.com/diffs/npm/postcss-cli/11.0.1/12.0.0) |
![age](https://developer.mend.io/api/mc/badges/age/npm/postcss-cli/12.0.0?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/postcss-cli/11.0.1/12.0.0?slim=true)
|

---

### Release Notes

<details>
<summary>postcss/postcss-cli (postcss-cli)</summary>

###
[`v12.0.0`](https://redirect.github.com/postcss/postcss-cli/blob/HEAD/CHANGELOG.md#1200--2026-09-04)

[Compare
Source](https://redirect.github.com/postcss/postcss-cli/compare/11.0.1...12.0.0)

- If using a YAML config, the `yaml` package must be installed
separately
([#&#8203;478](https://redirect.github.com/postcss/postcss-cli/pull/478))
- Requires Node.js v22+
([#&#8203;525](https://redirect.github.com/postcss/postcss-cli/pull/525))
- Errors if `--config` is passed, but no config is found
([#&#8203;467](https://redirect.github.com/postcss/postcss-cli/issues/467),
[#&#8203;522](https://redirect.github.com/postcss/postcss-cli/pull/522))
- Now properly exits with an error if invalid options/configuration are
passed in watch mode
([#&#8203;527](https://redirect.github.com/postcss/postcss-cli/pull/527))
- Upgrade to chokidar v5; which results in slightly different handling
of `dir-dependency` messages in watch mode
([#&#8203;501](https://redirect.github.com/postcss/postcss-cli/pull/501))
- Properly watchs all config files if there are multiple config files
([#&#8203;536](https://redirect.github.com/postcss/postcss-cli/pull/536))
- Minimized dependencies by removing fs-extra
([#&#8203;510](https://redirect.github.com/postcss/postcss-cli/pull/510))
- Internal refactoring

</details>

---

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package.json

@@ -101,7 +101,7 @@
     "nyc": "18.0.0",
     "pagefind": "1.5.2",
     "postcss": "8.5.28",
-    "postcss-cli": "11.0.1",
+    "postcss-cli": "12.0.0",
     "postcss-import": "17.0.0",
     "postcss-modules": "9.0.1",
     "prettier": "3.9.6",

yarn.lock

@@ -11345,7 +11345,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"fs-extra@npm:^11.0.0, fs-extra@npm:^11.1.1, fs-extra@npm:^11.2.0":
+"fs-extra@npm:^11.1.1, fs-extra@npm:^11.2.0":
   version: 11.3.5
   resolution: "fs-extra@npm:11.3.5"
   dependencies:
@@ -17486,26 +17486,25 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss-cli@npm:11.0.1":
-  version: 11.0.1
-  resolution: "postcss-cli@npm:11.0.1"
+"postcss-cli@npm:12.0.0":
+  version: 12.0.0
+  resolution: "postcss-cli@npm:12.0.0"
   dependencies:
-    chokidar: "npm:^3.3.0"
+    chokidar: "npm:^5.0.0"
     dependency-graph: "npm:^1.0.0"
-    fs-extra: "npm:^11.0.0"
     picocolors: "npm:^1.0.0"
-    postcss-load-config: "npm:^5.0.0"
+    postcss-load-config: "npm:^6.0.0"
     postcss-reporter: "npm:^7.0.0"
     pretty-hrtime: "npm:^1.0.3"
     read-cache: "npm:^1.0.0"
     slash: "npm:^5.0.0"
     tinyglobby: "npm:^0.2.12"
-    yargs: "npm:^17.0.0"
+    yargs: "npm:^18.0.0"
   peerDependencies:
     postcss: ^8.0.0
   bin:
     postcss: index.js
-  checksum: 10c0/4aa0b517269e27d288cbbcff54f572f95ca45fe082e49b77e9c3c3582ad0312bc65f98d98d3d98d18d8f64c473546277596e85ce6572b4d3e9c3b4ef8a1aff71
+  checksum: 10c0/a594c46bf1b9028e972add4b56dce9170c42850e249c383009733eab2face05f5870fe07a0f07617c796ab0663edb3acbb35698c6b8f9c4382e6fd442ec05988
   languageName: node
   linkType: hard
 
@@ -17628,24 +17627,26 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss-load-config@npm:^5.0.0":
-  version: 5.1.0
-  resolution: "postcss-load-config@npm:5.1.0"
+"postcss-load-config@npm:^6.0.0":
+  version: 6.0.1
+  resolution: "postcss-load-config@npm:6.0.1"
   dependencies:
     lilconfig: "npm:^3.1.1"
-    yaml: "npm:^2.4.2"
   peerDependencies:
     jiti: ">=1.21.0"
     postcss: ">=8.0.9"
     tsx: ^4.8.1
+    yaml: ^2.4.2
   peerDependenciesMeta:
     jiti:
       optional: true
     postcss:
       optional: true
     tsx:
       optional: true
-  checksum: 10c0/1631f2869619387166cf0aa900b5f3f652578862c0abbd8d9e9e1d679929c42720dd65f7ce60ccf930f94d4440ebdc3aa6b69d33e2df82b761a079d8cba87e23
+    yaml:
+      optional: true
+  checksum: 10c0/74173a58816dac84e44853f7afbd283f4ef13ca0b6baeba27701214beec33f9e309b128f8102e2b173e8d45ecba45d279a9be94b46bf48d219626aa9b5730848
   languageName: node
   linkType: hard
 
@@ -21112,7 +21113,7 @@ __metadata:
     nyc: "npm:18.0.0"
     pagefind: "npm:1.5.2"
     postcss: "npm:8.5.28"
-    postcss-cli: "npm:11.0.1"
+    postcss-cli: "npm:12.0.0"
     postcss-import: "npm:17.0.0"
     postcss-modules: "npm:9.0.1"
     prettier: "npm:3.9.6"
@@ -22343,7 +22344,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"yaml@npm:2.9.0, yaml@npm:^2.4.2, yaml@npm:^2.8.3, yaml@npm:^2.9.0":
+"yaml@npm:2.9.0, yaml@npm:^2.8.3, yaml@npm:^2.9.0":
   version: 2.9.0
   resolution: "yaml@npm:2.9.0"
   bin: