feat: Add Novita provider

feat: Implement prompt completions in cli interactive mode
fix: Remove yepchat, opengpt, leo providers
fix: Update CHANGELOG.md with new features and fixes

docs/CHANGELOG.md

@@ -577,4 +577,22 @@ For instance:
 
 **What's new?**
 
-- fix : Image generation failure.
+- fix : Image generation failure.
+
+## v0.7.5
+
+**What's new?**
+
+- feat: New provider - [Novita](https://novita.ai)
+
+## v0.7.8
+
+**What's new?**
+
+- feat: Added prompt completions in interactive mode `cli`
+
+## v0.7.9
+
+**What's new?**
+
+- fix: Remove providers: yepchat, opengpt, leo etc