Co-authored-by: Will Harney <62956339+wjhsf@users.noreply.github.com>

…emplate expressions (#4026)

* docs(features): add more JSDoc for top-level exports

* docs(wire-service): add more JSDoc for top-level exports

* docs(lwc): fix up JSDoc

* docs(compiler): add JSDoc for @lwc/compiler

* docs(engine-server): polish JSDoc for @lwc/engine-server

* chore: is anyone gonna read this commit message?

* docs(engine-dom): polish JSDoc for @lwc/engine-dom

* chore: avoid using magic string in comment

* chore: avoid @ts-ignore

* chore: finish incomplete changes

* fix(types): replace @ts-expect-error with type assertion

* fix: avoid type errors

* chore: restore explicit return type to minimize diff

* refactor: use HTMLElement shadowRoot instead of defining our own

* chore: remove unnecessary assertion

* fix(types): correctly indicate undefined can be returned

* fix: event listener not being invoked for native web components

* chore: simplify test

* chore: test tweaks

* chore: also avoid wrapping listeners for non-Node EventTargets

* chore: account for light dom nodes

* chore: account for window

---------

Co-authored-by: Eugene Kashida <ekashida@gmail.com>

#4033)

* feat: support generating inlined sourcemaps when transforming js files in the LWC compiler

* feat: support sourcemaps through rollup plugin

* fix: additional tests

* fix: add test for existing use case