fix: remove unsupported --verbose flag from yarn install

Yarn 4.x doesn't support the --verbose flag. Removed it from all workflows
while keeping the debug output for git configuration.

https://claude.ai/code/session_015R3U3kiprQiNTTNNt31Sg6

.github/workflows/build.yml

@@ -55,7 +55,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GIT_TERMINAL_PROMPT: 0
-        run: yarn install --immutable --verbose
+        run: yarn install --immutable
 
       - name: Build project
         run: yarn build

.github/workflows/lint.yml

@@ -55,7 +55,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GIT_TERMINAL_PROMPT: 0
-        run: yarn install --immutable --verbose
+        run: yarn install --immutable
 
       - name: Check linting
         run: yarn lint

.github/workflows/test.yml

@@ -56,7 +56,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GIT_TERMINAL_PROMPT: 0
-        run: yarn install --immutable --verbose
+        run: yarn install --immutable
 
       - name: Run tests
         run: yarn test