Improvement: Bundle rulesets in release ZIP files.

[DaveMcEwan]

Makes it easier to use rulesets for non-dev users that don't/won't clone the repo.

Before this PR, a release ZIP looked like:

svlint-v0.8.0-x86_64-lnx.zip
├── svlint                        <- The binary executable
└── svlint_MANUAL_v0.8.0.pdf      <- The documentation

With this PR, a release ZIP looks like:

svlint-v0.8.0-x86_64-lnx.zip
├── bin
│   ├── svlint                    <- The binary executable
│   ├── parseonly.toml            
│   ├── ... *.toml                <- TOML configurations
│   ├── svlint-parseonly
│   └── ... svlint-*              <- Wrapper scripts
└── doc
    └── svlint_MANUAL_v0.8.0.pdf  <- The documentation

Example ZIPs are here: https://github.com/DaveMcEwan/svlint/releases/tag/v0.0.12-DONOTUSE