Extract PluginAuthorServices from plugins project

[tresat]

Removes the PluginAuthorServices class from the plugins project and distribute its components to more appropriate JVM platform projects.

This allows for removing further dependencies from plugins and should make these services easier to locate.

[gitstream-cm]

⚠️ This PR appears to be lacking tests. Consider adding tests to cover the new functionality.

[gitstream-cm]

📊 Changes by Platform: this PR is 93% new code

3 platforms were affected (:warning: if possible, only one platform should have significant changes in a PR)

See details

Platform	Added Lines	% of Total Line Changes	Deleted Lines	% of Total Line Changes	Files Changed	% of Total Files Changed
null	4	6%	5	7%	2	33%
software	15	22%	0	0%	1	17%
jvm	45	65%	0	0%	3	50%

[gitstream-cm]

📊 Changes by Platform: this PR is 93% new code

3 platforms were affected (:warning: if possible, only one platform should have significant changes in a PR)

See details

Platform	Added Lines	% of Total Line Changes	Deleted Lines	% of Total Line Changes	Files Changed	% of Total Files Changed
null	4	6%	5	7%	2	33%
software	15	21%	0	0%	1	17%
jvm	48	67%	0	0%	3	50%

[tresat]

@bot-gradle test this

[bot-gradle]

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[tresat]

@bot-gradle test and merge