feat(bundle): JS plugin API for Deno.bundle() (resolve/load/transform)
Adds an esbuild-style plugin API to the unstable Deno.bundle() runtime API.
Plugins register onResolve/onLoad/onTransform callbacks with a RegExp filter;
they run before Deno's own resolution and loading, so they can resolve
virtual modules, load non-JS assets, and rewrite source. This targets common
agent workflows, not full Vite/esbuild plugin parity.
Mechanism: the bundler runs on its own thread and forwards each hook over an
mpsc channel; the JS runtime pumps requests (op_bundle_plugin_next), runs the
user's plugin chain, and answers (op_bundle_plugin_respond). Plugin hook
errors are recorded and surface as structured result.errors with the real
message instead of rolldown's generic wrapper.
Also makes Deno.bundle() return hard bundler errors as a structured
{ success: false, errors } result rather than throwing, and applies the
require-shim rewrite on the in-memory (write:false) path.
Claude-Session: https://claude.ai/code/session_01QXBexiVeaPBqGPgAxcTLNQ
deno
becbb4c3 - feat(bundle): JS plugin API for Deno.bundle() (resolve/load/transform)
