Added handling disallow_attester_search_for_domains OrgRule

[DenBond7]

This PR added handling disallow_attester_search_for_domains OrgRule

close#1203

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Tests(delete all except exactly one):

• Tests added or updated

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To be filled by reviewers

I have reviewed that this PR... (tick whichever items you personally focused on during this review):

• addresses the issue it closes (if any)
• code is readable and understandable
• is accompanied with tests, or tests are not needed
• is free of vulnerabilities

[IvanPizhenko]

I have a question

[IvanPizhenko]

doesn't this require sort of case-insensitive comparison?

[DenBond7]

This realization is based on https://github.com/FlowCrypt/flowcrypt-browser/blob/48cb02a244b71a2acffbbc0fdb6ed4254baa0da3/extension/js/common/org-rules.ts#L170-L192.

Does include mean case-insensitive comparison?

[IvanPizhenko]

In typescript we have:

publiccanLookupThisRecipientOnAttester=(emailAddr: string): boolean=>{
....constuserDomain=Str.getDomainFromEmailAddress(emailAddr);if(!userDomain){thrownewError(`Not a valid email ${emailAddr}`);}return!disallowedDomains.includes(userDomain);}

and then:

publicstaticgetDomainFromEmailAddress=(emailAddr: string)=>{// todo: parseEmail()?returnemailAddr.toLowerCase().split('@')[1];}

So function for getting domain in the typescript casts it to lowercase and then if you configure everything in lowercase, all works.
In Kotlin that doesn't happen:

// from EmailUtil.ktfungetDomain(email:String): String {
returnwhen {
TextUtils.isEmpty(email) ->""
email.contains("@") -> email.substring(email.indexOf('@') +1)
else->""
}
}

[DenBond7]

I see. Thank you. I will fix it.

[tomholub]

Well noticed, Ivan - thank you.