Adding custom filter for one-tap login

[mchirag2002]

Description

• This PR contains the changes that add a new custom filter that can be used to enqueue the one tap scripts on certain specific pages instead of it being available only on login pages or sitewide.

Fixes

Add Ability to Render One-Tap Login Code/JS on Specific Pages with Filters (#279)

[rtBot]

Code analysis identified issues

action-phpcs-code-review has identified potential problems in this pull request during automated scanning. We recommend reviewing the issues noted and that they are resolved.

phpcs scanning turned up:

🚫 4 errors

⚠️ 1 warning

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[mi5t4n]

I've left a few comments. Please feel free to reach out if you have any questions.

[mi5t4n]

This filter doesn’t appear to be working. Even when it returns false, the file build/js/onetap.js is still being loaded on every page.

Steps to reproduce

1. Goto the Login With Google Settings under the WP Settings menu.
2. Populate the required credentials like Client ID and Client Secret.
3. Checked the Create New User and Enable One Tap Login
4. Select the Enable One Tap Login Site-Wide option
5. Add below snippet code in Hello Dolly plugin or the in the current theme's functions.php file.

add_filter( 'rtcamp.google_one_tap_show', function( $is_allowed ) {
	return ! is_home();
});

6. Navigate to the homepage
7. We can still see the onetap pop-up view

Code that is probably causing the above issue

login-with-google/src/Modules/OneTapLogin.php

Lines 173 to 190 in 2a11dd6

	wp_register_script(
	'login-with-google-one-tap-js',
	trailingslashit( plugin()->url ) . 'assets/build/js/' . $filename,
	[
	'wp-i18n',
	],
	filemtime( trailingslashit( plugin()->path ) . 'assets/build/js/onetap.js' ),
	true
	);
	wp_add_inline_script(
	'login-with-google-one-tap-js',
	'var TempAccessOneTap=' . json_encode( $data ), //phpcs:disable WordPress.WP.AlternativeFunctions.json_encode_json_encode
	'before'
	);
	wp_enqueue_script( 'login-with-google-one-tap-js' );

[mi5t4n]

Add @since n.e.x.t to newly added function.

[mi5t4n]

Another thing, we have to version and document the newly added filter as well.