Rename PostCSS files to .pcss (#22769)

* Rename PostCSS files to `.pcss`

* Make Stylelint happy

* Make Stylelint happy v2

* Update CompatibilityView.tsx

* Update res/css/structures/ErrorView.pcss

Co-authored-by: Michael Weimann <mail@michael-weimann.eu>

* Merge branch 'develop' of github.com:matrix-org/matrix-react-sdk into t3chguy/pcss


 Conflicts:

	package.json

	res/css/_components.scss

	res/css/structures/_NotificationPanel.pcss

	res/css/views/dialogs/_SpotlightDialog.pcss

	res/css/views/rooms/_EventTile.pcss

	res/css/views/rooms/_ReadReceiptGroup.pcss

	yarn.lock

* Only use CI_PACKAGE mode on develop, it skips minification which can find some errors

* Keep name to not break existing PRs

Co-authored-by: Michael Weimann <mail@michael-weimann.eu>

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: Build and Package
+name: Build
 on:
   pull_request: { }
   push:
@@ -22,5 +22,5 @@ jobs:
       - name: Install Dependencies
         run: "./scripts/layered.sh"
 
-      - name: Build & Package
-        run: "./scripts/ci_package.sh"
+      - name: Build
+        run: "yarn build"

.github/workflows/static_analysis.yaml

@@ -57,9 +57,9 @@ jobs:
         with:
           cache: 'yarn'
 
-      # Does not need branch matching as only analyses this layer
-      - name: Install Deps
-        run: "yarn install --pure-lockfile"
+      # Needs branch matching as it inherits .stylelintrc.js from matrix-react-sdk
+      - name: Install Dependencies
+        run: "./scripts/layered.sh"
 
       - name: Run Linter
         run: "yarn run lint:style"