refactor: Use relative path instead of absolute when running packages get

lib/src/cli/flutter_cli.dart

@@ -84,10 +84,16 @@ class Flutter {
     bool recursive = false,
     Set<String> ignore = const {},
   }) async {
+    final initialCwd = cwd;
+
     await _runCommand(
       cmd: (cwd) async {
+        final relativePath = p.relative(cwd, from: initialCwd);
+        final path =
+            relativePath == '.' ? '.' : '.${p.context.separator}$relativePath';
+
         final installProgress = logger.progress(
-          'Running "flutter packages get" in $cwd',
+          'Running "flutter packages get" in $path ',
         );
 
         try {

test/src/cli/flutter_cli_test.dart

@@ -209,23 +209,30 @@ void main() {
             ),
             runProcess: process.run,
           ).whenComplete(() {
+            final nestedRelativePath =
+                p.relative(nestedDirectory.path, from: tempDirectory.path);
             verify(() {
               logger.progress(
                 any(
                   that: contains(
                     'Running "flutter packages get" in '
-                    '${nestedDirectory.path}',
+                    '.${p.context.separator}$nestedRelativePath',
                   ),
                 ),
               );
             }).called(1);
 
             verifyNever(() {
+              final ignoredRelativePath = p.relative(
+                ignoredDirectory.path,
+                from: tempDirectory.path,
+              );
+
               logger.progress(
                 any(
                   that: contains(
                     'Running "flutter packages get" in '
-                    '${ignoredDirectory.path}',
+                    './$ignoredRelativePath',
                   ),
                 ),
               );

test/src/commands/packages/commands/get_test.dart

@@ -342,12 +342,17 @@ void main() {
             tempDirectory.path,
           ],
         );
+
+        final relativePathPrefix = '.${path.context.separator}';
+
         expect(result, equals(ExitCode.success.code));
         verify(() {
           logger.progress(
             any(
               that: contains(
-                'Running "flutter packages get" in ${directoryA.path}',
+                'Running "flutter packages get" in '
+                '$relativePathPrefix'
+                '${path.relative(directoryA.path, from: tempDirectory.path)}',
               ),
             ),
           );
@@ -356,7 +361,9 @@ void main() {
           logger.progress(
             any(
               that: contains(
-                'Running "flutter packages get" in ${directoryB.path}',
+                'Running "flutter packages get" in '
+                '$relativePathPrefix'
+                '${path.relative(directoryB.path, from: tempDirectory.path)}',
               ),
             ),
           );