Migrate examples to tests_e2e directory structure

- Relocated all files and scripts from `examples` to `tests_e2e` for better organization.
- Updated references and paths in configurations, scripts, and test files.
- Adjusted `bump-version.sh` to handle the new `tests_e2e` structure.
- Updated `.gitignore` to reflect path changes.

examples/fixtures/header-echo/server.py

@@ -1,33 +0,0 @@
-#!/usr/bin/env python3
-"""Simple HTTP server that echoes all request headers"""
-
-from http.server import HTTPServer, BaseHTTPRequestHandler
-import json
-
-class HeaderEchoHandler(BaseHTTPRequestHandler):
-    def do_GET(self):
-        self.send_response(200)
-        self.send_header('Content-Type', 'application/json')
-        self.end_headers()
-
-        # Collect all headers
-        headers = dict(self.headers)
-
-        # Add the client IP as seen by this server
-        response = {
-            'headers': headers,
-            'client_ip': self.client_address[0],
-            'x_forwarded_for': self.headers.get('X-Forwarded-For', 'NOT SET')
-        }
-
-        self.wfile.write(json.dumps(response, indent=2).encode())
-
-    def log_message(self, format, *args):
-        # Log to stdout
-        print(f"{self.address_string()} - {format % args}")
-
-if __name__ == '__main__':
-    port = 8080
-    server = HTTPServer(('0.0.0.0', port), HeaderEchoHandler)
-    print(f'Header echo server running on port {port}...')
-    server.serve_forever()