feat: oEmbed implementation

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Support for oEmbed resolving for websites customizable with the `resolvers.json` file. See `data/oembed/resolvers.json`. (#139)
 - Breaking: Environment variable `CHATTERINO_API_CACHE_TWITCH_CLIENT_ID` was renamed to `CHATTERINO_API_TWITCH_CLIENT_ID`. (#144)
 - Dev, Breaking: Replaced `dankeroni/gotwitch` with `nicklaw5/helix`. This change requires you to add new environment variable: `CHATTERINO_API_TWITCH_CLIENT_SECRET` - it's a client secret generated for your Twitch application.
 

data/oembed/README.md

@@ -0,0 +1,13 @@
+# providers.json
+
+Original source: https://oembed.com/providers.json (2021-05-09)
+
+## Removed providers:
+
+- Kickstarter because its oembed provides less data than using opengrah values
+- Reddit because its oembed provides less data than using opengraph values
+- Spotify because its oembed provides less data than using opengraph values
+- Twitter because we have a rich resolver already
+- YouTube because we have a rich resolver already
+
+And a few more that can be diffed between https://oembed.com/providers.json and our providers.json file