feat(embed): Add support for dark mode (#6912)

* feat(embed): Support dark mode (wip)

* finishing up the implementation

* fix tailwind color selector

* tweak design

* refactor: unify types

* fix

* fix english grammar

* refactor: unify types

* tweak design

* remove the customization part

bskyembed/tsconfig.json

@@ -1,4 +1,3 @@
-
 {
   "compilerOptions": {
     "target": "ES5",
@@ -20,5 +19,5 @@
     "jsxFragmentFactory": "Fragment",
     "downlevelIteration": true
   },
-  "include": ["src", "vite.config.ts"]
+  "include": ["src", "snippet", "vite.config.ts"]
 }