Outbound live stream notifications (#1663)

* First pass at browser, discord, twilio notifications

* Commit updated Javascript packages

* Remove twilio notification support

* Email notifications/smtp support

* Fix Firefox notification support, remove chrome checks

* WIP more email work

* Add support for twitter notifications

* Add stream title to discord and twitter notifications

* Update notification registration modal

* Fix hide/show email section

* Commit updated API documentation

* Commit updated Javascript packages

* Fix post-rebase missing var

* Remove unused var

* Handle unsubscribe errors for browser push

* Standardize email config prop names

* Allow overriding go live email template

* Some notifications cleanup

* Commit updated Javascript packages

* Remove email/smtp/mailjet support

* Remove more references to email notifications

Co-authored-by: Owncast <owncast@owncast.online>

models/notification.go

@@ -0,0 +1,27 @@
+package models
+
+// DiscordConfiguration represents the configuration for the discord
+// notification service.
+type DiscordConfiguration struct {
+	Enabled       bool   `json:"enabled"`
+	Webhook       string `json:"webhook,omitempty"`
+	GoLiveMessage string `json:"goLiveMessage,omitempty"`
+}
+
+// BrowserNotificationConfiguration represents the configuration for
+// browser notifications.
+type BrowserNotificationConfiguration struct {
+	Enabled       bool   `json:"enabled"`
+	GoLiveMessage string `json:"goLiveMessage,omitempty"`
+}
+
+// TwitterConfiguration represents the configuration for Twitter access.
+type TwitterConfiguration struct {
+	Enabled           bool   `json:"enabled"`
+	APIKey            string `json:"apiKey"`    // aka consumer key
+	APISecret         string `json:"apiSecret"` // aka consumer secret
+	AccessToken       string `json:"accessToken"`
+	AccessTokenSecret string `json:"accessTokenSecret"`
+	BearerToken       string `json:"bearerToken"`
+	GoLiveMessage     string `json:"goLiveMessage,omitempty"`
+}