feat: add directory-scoped host defaults (match_dirs) and repo list --limit

Add match_dirs field to host config entries for directory-based host
resolution. When no --hostname flag, FGJ_HOST env var, or git remote is
detected, the longest matching directory prefix determines the host.
Symlinks are resolved on both sides for macOS compatibility (/tmp →
/private/tmp). Also adds --limit/-L flag to repo list.

internal/api/client.go

@@ -39,8 +39,8 @@ func NewClient(hostname, token string) (*Client, error) {
 	}, nil
 }
 
-func NewClientFromConfig(cfg *config.Config, hostname string, detectedHost string) (*Client, error) {
-	host, err := cfg.GetHost(hostname, detectedHost)
+func NewClientFromConfig(cfg *config.Config, hostname string, detectedHost string, cwd string) (*Client, error) {
+	host, err := cfg.GetHost(hostname, detectedHost, cwd)
 	if err != nil {
 		return nil, err
 	}

internal/api/client_test.go

@@ -21,7 +21,7 @@ func TestNewClientFromConfig_MissingHost(t *testing.T) {
 		Hosts: map[string]config.HostConfig{},
 	}
 
-	_, err := NewClientFromConfig(cfg, "nonexistent.org", "")
+	_, err := NewClientFromConfig(cfg, "nonexistent.org", "", "")
 	if err == nil {
 		t.Error("Expected error for nonexistent host")
 	}