feat(taxonomy): add query-parameter support to Taxonomy, Term, and TermQuery

Add chainable helpers so common CDA query params can be sent on the
published taxonomy/term endpoints, which previously issued requests with
no params at all:

- Term: depth(), includeFallback(), includeBranch(), param(), addParams()
  and locale support on fetch(); all request methods (fetch/locales/
  ancestors/descendants) now forward _queryParams.
- Taxonomy: includeFallback(), includeBranch(), param(), addParams(), and
  locale support on fetch() (fetch() now forwards _queryParams).
- TermQuery: depth(), skip(), limit(), includeCount(), includeFallback(),
  includeBranch(), locale(), param(), addParams().

Also fix broken unit-test imports (src/lib/* -> src/taxonomy/*, src/query/*)
so the taxonomy suites load, and add coverage asserting the params reach
the request.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: harshithad0703