Feat/dora mvp (#5)

* feat: Add automated CI failure investigator workflow to analyze and report on CI failures.

* Remove frontend application files and add GitHub Action for DORA metrics generation

- Deleted frontend source files including App, Dashboard, and Login components.
- Removed package.json and vite.config.js for the frontend.
- Added .env.example for environment variable configuration.
- Introduced action.yml for GitHub Action to calculate DORA metrics and upload CSV artifacts.
- Created dora_metrics_csv.py script to generate DORA metrics from GitHub repositories.

* feat: Enhance GitHub API request handling with retry logic and timeout

* fix: Correct dependency installation in action.yml to ensure proper environment setup

Author: chandanrattan

.env.example

@@ -0,0 +1,19 @@
+# Copy and edit these values for local execution.
+GH_TOKEN_INPUT=
+
+# Choose exactly one mode:
+#
+# 1) Single repository mode
+INPUT_OWNER=
+INPUT_REPO=
+# DORA_TOPIC=
+#
+# 2) Topic mode (set topic, leave DORA_REPO empty, optional owner filter)
+# DORA_OWNER=my-org
+# DORA_REPO=
+# DORA_TOPIC=microservice
+
+# Optional tuning
+INPUT_TOPIC=
+INPUT_DAYS=30
+DORA_OUT_DIR=artifacts