[5.2] SEF: Add "Strict Routing" option

[Hackwar]

Summary of Changes

Joomla has been improving its SEO performance constantly and with hopefully 5.2 we will allow for a stricter routing, which removes a lot of duplicate content. This PR introduces a switch to enable all these new behaviors, but does not implement them itself. It is basically a preparation for #42850, #42854 and #42989.

Testing Instructions

Codereview

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

[robbiejackson]

I've tested this functionality on my Joomla 5.1 instance and it worked ok.

I checked that the form displayed correctly, showed the correct online help and stored the correct values in the params field in the database.

[Quy]

Please go to the issue tracker here https://issues.joomla.org/tracker/joomla-cms/43432 and use the blue "Test this" button at the top left corner, select your test result and submit. Otherwise your test will not be counted. A PR needs 2 successful human tests to get accepted.

[robbiejackson]

I have tested this item ✅ successfully on aaf1684

I checked that the form displayed correctly, showed the correct online help and stored the correct values in the params field in the database.

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43432.}

[chmst]

I have tested this item ✅ successfully on cc0c919

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43432.}

[SniperSister]

I have tested this item ✅ successfully on cc0c919

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43432.}

[pe7er]

Thanks @Hackwar !

[SemaphoreOxalis]

Hi,
Before J!5 I red that any new feature could be validated without documentation. So could we have documentation about this one because it seems a nice one but I don't get why, how and what is the impact (good or not) of each option.
Thanks for the work !