Add ParameterizedSubject project

[mtmk]

Introduced a new project, Synadia.Orbit.ParameterizedSubject, to facilitate safe and consistent parameterized NATS subject generation. Included extension methods for subject sanitization, detailed documentation, and unit tests to ensure reliability. Packaged the project with multi-framework support and a preview version for release. Added a test project for validation.

Parameterize Examples

using Synadia.Orbit.ParameterizedSubject;

var subject = "users.?.events.?".Parameterize("alice", "login");
// => "users.alice.events.login"

var s = "files.?".Parameterize("v1.2");
// => "files.v1%2E2"

var s2 = "a.?".Parameterize("x*y>z%");
// => "a.x%2Ay%3Ez%25"

"a b.?".Parameterize("x");    // throws
"a\r\nb.?".Parameterize("x"); // throws
"a\tb".Parameterize();        // throws

EnsureSanitized Examples

using Synadia.Orbit.ParameterizedSubject;

"ok".EnsureSanitized();        // no throw
"v1.2".EnsureSanitized();      // no throw
"has space".EnsureSanitized(); // throws ArgumentException
"has\ttab".EnsureSanitized();  // throws ArgumentException
"has\rCR".EnsureSanitized();   // throws ArgumentException
"has\nLF".EnsureSanitized();   // throws ArgumentException