feat(indexers): add support for optional baseurl override (#551)

* feat(indexers): optional baseurl override

* feat(indexers): update baseUrl parsing

* refactor(indexers): BREAKING move parse to IRC struct

* Move Parse as part of IRC struct from Indexer
* Updated definitions
* Build torrentUrl in stages
* Use new url.JoinPath to build torrentUrl
* Update tests

* refactor(indexers): select option obj

* refactor(indexers): make backwards compatible

internal/indexer/definitions/subsplease.yaml

@@ -5,7 +5,7 @@ identifier: subsplease
 description: SubsPlease is an indexer for Anime.
 language: en-us
 urls:
-  - https://subsplease.org
+  - https://subsplease.org/
 privacy: public
 protocol: torrent
 supports:
@@ -41,16 +41,16 @@ irc:
       label: NickServ Password
       help: NickServ password
 
-parse:
-  type: single
-  lines:
-    - pattern: '\[Release\] (.*(SubsPlease).*.(mkv)) \((.*)\) - .* - (.*)'
-      vars:
-        - torrentName
-        - releaseGroup
-        - releaseTags
-        - torrentSize
-        - torrentUrl
+  parse:
+    type: single
+    lines:
+      - pattern: '\[Release\] (.*(SubsPlease).*.(mkv)) \((.*)\) - .* - (.*)'
+        vars:
+          - torrentName
+          - releaseGroup
+          - releaseTags
+          - torrentSize
+          - torrentUrl
 
-  match:
-    torrenturl: "{{.torrentUrl}}"
+    match:
+      torrenturl: "{{ .torrentUrl }}"