feat(router): added a simple wrapper around background tasks

feat(router): added a mechanism to store per-request context using req.extensions
feat(router): jwt authentication config
feat(config): added jwt config
fix(config): load references files relative to the config directory, or current if not specified
chore: added e2e test setup and testkit

ok getting there

fix clippy

fixes

fix docs

added forwarding testing

Author: dotansimha

.cargo/config.toml

@@ -5,6 +5,7 @@ dev = "run --package qp-dev-cli"
 subgraphs = "run --package subgraphs"
 test_all = "test --workspace"
 test_qp = "test --package hive-router-query-planner -- --nocapture"
+test_e2e = "test --package e2e -- --nocapture"
 test_qpe = "test --package hive-router-plan-executor -- --nocapture"
 "clippy:fix" = "clippy --all --fix --allow-dirty --allow-staged"
 "router-config" = "run --release -p hive-router-config router-config.schema.json"