Add SPDX tag-value format object

[wagoodman]

Closes #590

This PR ports the last of the package presenter objects to a format object (with encoding only, no decoder or validator). Since this is the last object there is a little more clean up work that was additionally done:

• Swaps the presenter utils to the formats utils in the cmd package.
• Removes the presenter package altogether, swapping for a single global definition

Future work:

• Remove the power-user presenter by combining it with the packages format object (related to Encapsulate all artifacts in syft JSON output #555 , Syft command restructure #516, and Promote cataloging task pattern #554)

[github-actions]

Benchmark Test Results

Benchmark results from the latest changes vs base branch

name                                                   old time/op    new time/op    delta
ImagePackageCatalogers/ruby-gemspec-cataloger-2          1.54ms ± 1%    1.23ms ± 6%  -19.77%  (p=0.008 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2        3.10ms ± 8%    2.48ms ± 2%  -20.14%  (p=0.008 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2     918µs ± 1%     745µs ± 1%  -18.88%  (p=0.008 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                 948µs ± 2%     755µs ± 1%  -20.33%  (p=0.008 n=5+5)
ImagePackageCatalogers/rpmdb-cataloger-2                  954µs ± 1%     773µs ± 1%  -19.02%  (p=0.008 n=5+5)
ImagePackageCatalogers/java-cataloger-2                  13.1ms ± 1%    10.6ms ± 1%  -19.15%  (p=0.008 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                 1.24ms ± 2%    1.03ms ± 1%  -17.07%  (p=0.008 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2       764ns ± 1%     612ns ± 1%  -19.84%  (p=0.008 n=5+5)

name                                                   old alloc/op   new alloc/op   delta
ImagePackageCatalogers/ruby-gemspec-cataloger-2           227kB ± 0%     227kB ± 0%   -0.41%  (p=0.008 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2         980kB ± 0%     980kB ± 0%   -0.05%  (p=0.008 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2     192kB ± 0%     192kB ± 0%     ~     (p=0.151 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                 211kB ± 0%     211kB ± 0%   -0.21%  (p=0.008 n=5+5)
ImagePackageCatalogers/rpmdb-cataloger-2                  217kB ± 0%     217kB ± 0%   +0.00%  (p=0.008 n=5+5)
ImagePackageCatalogers/java-cataloger-2                  3.12MB ± 0%    3.12MB ± 0%     ~     (p=0.690 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                 1.26MB ± 0%    1.26MB ± 0%   -0.00%  (p=0.008 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2        336B ± 0%      336B ± 0%     ~     (all equal)

name                                                   old allocs/op  new allocs/op  delta
ImagePackageCatalogers/ruby-gemspec-cataloger-2           5.46k ± 0%     5.46k ± 0%     ~     (all equal)
ImagePackageCatalogers/python-package-cataloger-2         18.1k ± 0%     18.1k ± 0%     ~     (p=0.849 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2     4.80k ± 0%     4.80k ± 0%     ~     (all equal)
ImagePackageCatalogers/dpkgdb-cataloger-2                 5.53k ± 0%     5.53k ± 0%     ~     (all equal)
ImagePackageCatalogers/rpmdb-cataloger-2                  6.22k ± 0%     6.22k ± 0%     ~     (all equal)
ImagePackageCatalogers/java-cataloger-2                   51.5k ± 0%     51.5k ± 0%     ~     (p=1.000 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                  5.49k ± 0%     5.49k ± 0%     ~     (p=0.333 n=5+4)
ImagePackageCatalogers/go-module-binary-cataloger-2        9.00 ± 0%      9.00 ± 0%     ~     (all equal)

[spiffcs]

So happy this is here!