feat: Add http-schema sample for schema-match testing

[pathakharshit]

Summary

Adds a new Python sample app (http-schema) to demonstrate and test Keploy's schema-match feature.

Files Added

• app.py - Socket-based HTTP server with 10 endpoints
• app-test.py - Modified version for schema-match testing
• check_endpoints.py - Script to verify all endpoints
• keploy.yml - Keploy configuration

Endpoints (10 total)

Endpoint	Purpose
/user/profile	Nested objects & mixed types
/user/history	Array of objects
/product/search	Search results with metadata
/admin/config	Booleans & null values
/data/matrix	2D arrays
/data/mixed_array	Heterogeneous array
/edge/empty_response	Empty JSON {}
/edge/null_root	Root null value
/edge/large_payload	Large (~5KB) payload
/edge/special_chars	Special chars, unicode, emojis

Related PR

• keploy/keploy#XXX (schema-match feature)