Expanded linting + fix warnings (#1396)

* Expand the linters and types of warnings to improve consistency and safety

* Fail lint workflow if there are errors

* golint has been replaced by revive

* Hand-pick some of the default exclude list

* Ignore error when trying to delete preview gif

* Ignore linter warning opening playlist path

* Rename user field Id -> ID

* A bunch of renames to address linter warnings

* Rename ChatClient -> Client per linter suggestion best practice

* Rename ChatServer -> Server per linter suggestion best practice

* More linter warning fixes

* Add missing comments to all exported functions and properties

core/webhooks/chat.go

@@ -5,6 +5,7 @@ import (
 	"github.com/owncast/owncast/models"
 )
 
+// SendChatEvent will send a chat event to webhook destinations.
 func SendChatEvent(chatEvent *events.UserMessageEvent) {
 	webhookEvent := WebhookEvent{
 		Type: chatEvent.GetMessageType(),
@@ -12,7 +13,7 @@ func SendChatEvent(chatEvent *events.UserMessageEvent) {
 			User:      chatEvent.User,
 			Body:      chatEvent.Body,
 			RawBody:   chatEvent.RawBody,
-			ID:        chatEvent.Id,
+			ID:        chatEvent.ID,
 			Visible:   chatEvent.HiddenAt == nil,
 			Timestamp: &chatEvent.Timestamp,
 		},
@@ -21,6 +22,7 @@ func SendChatEvent(chatEvent *events.UserMessageEvent) {
 	SendEventToWebhooks(webhookEvent)
 }
 
+// SendChatEventUsernameChanged will send a username changed event to webhook destinations.
 func SendChatEventUsernameChanged(event events.NameChangeEvent) {
 	webhookEvent := WebhookEvent{
 		Type:      models.UserNameChanged,