docs: mention gRPC mocks

docs: describe gRPC plugin

docs: describe WSDL scaffolding

chore(deps): bump actions/setup-python from 5.6.0 to 6.2.0

docs: update contribution instructions.

ci: fix dependabot config formatting.

ci: target dependabot PRs at main.

docs: link to main docs site.

build: configure pip ecosystem.

build: align dependabot config to ecosystems used.

refactor: move JVM engine to standalone repo.

build: ignore agent config.

docs: describe external URI support.

build: next development version.

build: release v4.7.0.