In this commit:
- Replace _QL pack_ with _CodeQL pack_
- Replace `about-ql-pack` references with `about-codeql-packs`
- Replace examples using `libraryPathDependencies with
`dependencies`
- Update some examples to specify the optional `version` field
- Update description of query specifiers to note that a path
within a pack is valid.
Include links to the CLI changelog, CLI releases, bundle releases,
pack changelogs, and pack source.
Clarify that this support information applies to the current version of
the CLI, bundle, query packs, and library packs.