[5.1] Convert mod_tags_similar to service provider

[joomlaweby]

Summary of Changes

Converts the tags similar site module to service provider.

Testing Instructions

1. Make sure you have site module mod_tags_similar published
2. Add some tags and assign them to several content items
3. You should see module output on content items, which have at least 1 tag assigned and this tag is assigned also on another content items.

Actual result BEFORE applying this Pull Request

Module works as expected

Expected result AFTER applying this Pull Request

Module works same way as before applying pull request

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[viocassel]

I have tested this item ✅ successfully on ab215d4

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[fgsw]

I have tested this item ✅ successfully on ab215d4

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42898.}

[fgsw]

What means "Service Provider"?

[richard67]

RTC

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[joomlaweby]

What means "Service Provider"?

@fgsw Simple explanation is, that it is a new way, how extensions in Joomla works since 4.0. I found more technical explanation here: https://docs.joomla.org/J4.x:Dependency_Injection_in_Joomla_4#Providers

For example in mod_articles_latest extension it is this file: https://github.com/joomla/joomla-cms/blob/5.1-dev/modules/mod_articles_latest/services/provider.php

[LadySolveig]

Thank you @joomlaweby and also for testing @viocassel and @fgsw