Implement project.godot file associations for the Android editor

[m4gr3d]

Fixes godotengine/godot-proposals#6201

Tested the feature with the Files by Google app, the Explorer app and the HorizonOS 'Files' app:

Screen_Recording_20260210_120538.mp4

[Alex2782]

Looks good, tested on Samsung Tab S7 and Chromebook (Files - Google App)

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I also have a very old myfiles app from Samsung installed on my Samsung Tab S7. It doesn't work with that app.

It seems to be available in the Play Store, but I can't search for it. In the system settings, under Apps, I can see that the app comes from the Play Store, but when I open the Play Store from there, I get a warning that the app isn't compatible with my device. Very strange.

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https://developer.android.com/guide/topics/manifest/data-element#path

<!--<data android:pathPattern=".*\\.godot" />-->
<data android:pathSuffix=".godot" />

The pathSuffix attribute is matched exactly against the ending part of the path in the Intent object, and this attribute doesn't have to begin with the / character.

I also tried this; the Google Files app worked fine, but not the old Samsung "myfiles" app.

[Repiteo]

Thanks!