Support Scala 3.5.0 and 3.4.3

[2m]

Added override modifier because since 3.5.0 missing modifier is an error:

[info] compiling 1 Scala source to /Users/martynas/projects/zerowaste/target/scala-3.5.0/classes ...
[error] -- [E164] Declaration Error: /Users/martynas/projects/zerowaste/src/main/scala-3/com/github/ghik/zerowaste/ZerowastePlugin.scala:18:6 
[error] 18 |  def init(options: List[String]): List[PluginPhase] =
[error]    |      ^
[error]    |error overriding method init in trait StandardPlugin of type (options: List[String]): List[dotty.tools.dotc.plugins.PluginPhase];
[error]    |  method init of type (options: List[String]): List[dotty.tools.dotc.plugins.PluginPhase] needs `override` modifier
[error] one error found
[error] Total time: 3 s, completed Aug 28, 2024, 3:20:41 PM
[error] (Compile / compileIncremental) Compilation failed

[ghik]

Thanks!

[2m]

The new release publish job failed: https://github.com/ghik/zerowaste/actions/runs/10597951965/job/29369443580

[ghik]

@2m fixed!