[Robots.txt] Add units test based on examples in RFC 9309 #420
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This PR adds unit tests for all examples provided in RFC 9309. For the examples of paths containing percent-encoded characters the unit tests of Google's RFC reference parser and the errata were consulted:
/foo/bar/\u30C4resp./foo/bar/%E3%83%84- see errata/foo/bar?baz=https://foo.barand/foo/bar?baz=https%3A%2F%2Ffoo.barare matched "as is" without decoding or encoding also in the unit tests of the reference parser. See also the discussion of #309 for crawler-commons' BasicURLNormalizer./foo/bar/%62%61%7Ain the robots.txt matches/foo/bar/baz- it's a minor improvement of SimpleRobotRulesParser over the reference parser