Summary

Adds runner support for tests that provide a full CQL <library> and a named
<output>, complementing the schema change in cqframework/cql-tests#141.
Enables cqframework/cql-tests#61 to actually execute, and is the runner side of
cqframework/cql-tests#17.

Changes

• models/test-types.ts: add TestLibrary; make expression optional; add
  library and TestOutput.name.
• shared/results-shared.ts: build a Result from a library test (evaluates the
  define named by <output name>, defaulting to output) and pass the library
  inline via the $cql content parameter.
• commands/build-cql-command.ts: skip library tests (they are evaluated inline,
  not wrapped as generated define statements).

Wire format

The cqframework $cql operation accepts the whole library as a top-level
content (string) parameter plus expression = the unqualified define name;
it returns the result keyed by that define name. (HL7 base $cql only references
libraries by URL; this uses the cqframework inline-content extension.)

⚠️ Authoring note (engine caching)

The engine caches inline libraries by name + version, so every
library-style test must declare a unique library name or a stale compiled
copy is returned. Discovered while validating; flagging for test authors. A
future hardening could auto-uniquify the name/version per test.

Validation

tsc --noEmit clean; ran the runner against #61's file →
SimpleOverloadMatching status: pass.

Relationship to other work

• Schema counterpart: Add library-style test support to the test schema cql-tests#141
• Part of Proposal for Multi-Library, Multi-Resource Tests cql-tests#17
• Enables Add the overloads test back in cql-tests#61