Resolve local packages before the root Flutter analyze

The root flutter analyze discovers nested packages as their own analysis
contexts, which fail to resolve dev dependencies until each package has
run dart pub get. Move the local package lint step ahead of the root
analyze so its pub get also serves the root run.

Author: elasticdog

.github/workflows/check-flutter.yml

@@ -45,9 +45,8 @@ jobs:
       - name: Install dependencies
         run: flutter pub get --enforce-lockfile
 
-      - name: Check lints
-        run: flutter analyze
-
+      # Runs before the root analyze: resolving each package also gives the
+      # root analyzer a package config for the nested contexts it discovers.
       - name: Check local package lints
         run: |
           set -euo pipefail
@@ -56,6 +55,9 @@ jobs:
             (cd "$package" && dart pub get && dart analyze --fatal-infos)
           done
 
+      - name: Check lints
+        run: flutter analyze
+
   test:
     name: test
     runs-on: ubuntu-latest