Add Nix cataloger (#1696)

* Add Basic Nix Cataloger

Signed-off-by: Julio Tain Sueiras <juliosueiras@gmail.com>

* Update nix def for the latest syft definition

Signed-off-by: Julio Tain Sueiras <juliosueiras@gmail.com>

* capture nix package files on pkg.NixStoreMetadata

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* fix unit tests and linting

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* update JSON schema

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* address review comments

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* Update syft/pkg/cataloger/nix/parse_nix_store_path_test.go

Co-authored-by: Florian Klink <flokli@flokli.de>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* support unstable version conventions

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* update json schema relative to main branch

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* update syft json with v7.1.1 schema

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* fix CLI tests

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* remove extra continue statement

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* add Nix to list of supported ecosystems

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

---------

Signed-off-by: Julio Tain Sueiras <juliosueiras@gmail.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Co-authored-by: Julio Tain Sueiras <juliosueiras@gmail.com>
Co-authored-by: Florian Klink <flokli@flokli.de>

test/integration/catalog_packages_cases_test.go

@@ -390,4 +390,11 @@ var commonTestCases = []testCase{
 			"example-jenkins-plugin": "1.0-SNAPSHOT",
 		},
 	},
+	{
+		name:    "find nix store packages",
+		pkgType: pkg.NixPkg,
+		pkgInfo: map[string]string{
+			"glibc": "2.34-210",
+		},
+	},
 }

test/integration/test-fixtures/image-pkg-coverage/pkgs/nix/store/h0cnbmfcn93xm5dg2x27ixhag1cwndga-glibc-2.34-210-bin/share/man/glibc.1

@@ -0,0 +1 @@
+the man pages