[Refactor]: Core/API Split (#1506)

Refactors api folder to core, creates firm split between backend code and api frontend.

pkg/schema/whisper.go

@@ -0,0 +1,16 @@
+package schema
+
+import "time"
+
+type WhisperSegment struct {
+	Id     int           `json:"id"`
+	Start  time.Duration `json:"start"`
+	End    time.Duration `json:"end"`
+	Text   string        `json:"text"`
+	Tokens []int         `json:"tokens"`
+}
+
+type WhisperResult struct {
+	Segments []WhisperSegment `json:"segments"`
+	Text     string           `json:"text"`
+}