Complete Octave, LuaRocks, Alire and DUB detection and dependency discovery

[andrew]

Fill the knowledge-base and dependency-discovery gaps for Octave, LuaRocks, Alire and DUB. Checked with a CLI built from revision dddbfd260229412890d8e6712b8ce54d2ea18021, using Go 1.27.1, against small project directories containing the files below.

Project input	Current CLI result	Required change
Octave DESCRIPTION and inst/hello.m	Languages are Objective-C and R; the dependency is reported as pkg:cran/octave	Add Octave language/package-manager definitions and disambiguate shared file extensions and manifest names
hello.lua and hello-1.0-1.rockspec	Lua detected; no package manager or dependencies	Add LuaRocks definition, rockspec language markers and manifest discovery
alire.toml alone	No language or package manager	Include the manifest in Ada detection so ecosystem filtering does not suppress Alire
alire.toml plus src/hello.adb	Ada and Alire detected; no dependencies	Discover the manifest after upstream parser support is available
dub.json declaring a dependency on vibe-d	D and DUB detected; no dependencies	Add DUB manifests to dependency discovery

To reproduce the Octave case, create DESCRIPTION containing:

Name: hello
Version: 1.0.0
Date: 2026-09-22
Author: Example
Maintainer: Example
Title: Hello world
Description: A sample Octave package.
Depends: octave (>= 4.0.0)
License: GPL-3.0-or-later

Add inst/hello.m containing an Octave function, then run brief <project-directory>. knowledge/objc/language.toml matches every .m file, while knowledge/r/language.toml matches DESCRIPTION without checking its contents. Adding another positive Octave match alone would leave the incorrect detections in place. Cover genuine Objective-C, MATLAB and R inputs when disambiguating these markers.

For DUB, a directory containing only dub.json with {"name":"hello","dependencies":{"vibe-d":"*"}} reproduces the missing dependency output. DUB and LuaRocks parsers already exist in the manifests dependency, but knowledge/_shared/_manifests.toml omits their files. Rockspec filenames vary, so discovery needs pattern expansion rather than passing a literal *.rockspec filename to the parser. The DUB definition already declares dub.selections.json as a lockfile; preserve that reporting. Its configured documentation URL, https://dub.pm/dub-guide/getting-started, returned 404 and needs replacing.

The parser work for Alire and Octave is tracked in git-pkgs/manifests#103. Fix Octave's incorrect CRAN classification there and update the dependency when that fix is available. Keep format parsing in manifests rather than adding a Brief-specific workaround.

Missing technology terms are tracked in ecosyste-ms/oss-taxonomy#22. Once published, refresh kb/testdata/oss-taxonomy-terms.txt and use the terms in the relevant definitions.

Add project fixtures and tests through the CLI or normal scan entrypoint for these cases, including manifest-only Alire projects and rockspec-only Lua packages. Check the resulting languages, package managers and dependency output as well as validating the TOML definitions.