Add Arrtrix runtime, config, onboarding, and webhook support

- Implement runtime package for bridge startup, config loading, and env
  overrides
- Add onboarding package for management room welcome messages
- Add matrixcmd package for command processing and help
- Add webhook package with Radarr webhook support and validation
- Extend connector config for webhooks and validation
- Update default config and example config for new options
- Add tests for new packages and config validation
- Change database type default to sqlite3-fk-wal

packages/arrtrix/pkg/connector/config.go

@@ -2,17 +2,52 @@ package connector
 
 import (
 	_ "embed"
+	"fmt"
+	"net/http"
 
 	up "go.mau.fi/util/configupgrade"
+	"maunium.net/go/mautrix/bridgev2"
+
+	"sneeuwvlok/packages/arrtrix/pkg/webhook"
 )
 
 //go:embed example-config.yaml
 var ExampleConfig string
 
-type Config struct{}
+type Config struct {
+	Webhooks WebhooksConfig `yaml:"webhooks"`
+}
+
+type WebhooksConfig struct {
+	Radarr webhook.RadarrConfig `yaml:"radarr"`
+}
+
+func (c *Config) applyDefaults() {
+	c.Webhooks.Radarr.ApplyDefaults()
+}
+
+func (c *Config) Validate() error {
+	return c.Webhooks.Radarr.Validate()
+}
 
 func upgradeConfig(helper up.Helper) {}
 
 func (s *ArrtrixConnector) GetConfig() (string, any, up.Upgrader) {
+	s.Config.applyDefaults()
 	return ExampleConfig, &s.Config, up.SimpleUpgrader(upgradeConfig)
 }
+
+func (s *ArrtrixConnector) ValidateConfig() error {
+	s.Config.applyDefaults()
+	return s.Config.Validate()
+}
+
+func (s *ArrtrixConnector) MountRoutes(router *http.ServeMux) error {
+	s.Config.applyDefaults()
+	if s.Bridge == nil {
+		return fmt.Errorf("bridge is not initialized")
+	}
+	return webhook.MountRadarr(router, s.Bridge, s.Config.Webhooks.Radarr)
+}
+
+var _ bridgev2.ConfigValidatingNetwork = (*ArrtrixConnector)(nil)