Allow Organisations to have a E-Mail

[JakobDev]

Resolves #25057

This adds a E-Mail field to Organisations. The E-Mail is just shown on the Profile when it is visited by a logged in User. The E-mail is not used for something else.

Screenshots:

[silverwind]

Test failure related:

    api_user_orgs_test.go:103: 
        	Error Trace:	/home/runner/work/gitea/gitea/tests/integration/api_user_orgs_test.go:103
        	Error:      	Not equal: 
        	            	expected: []*structs.Organization{(*structs.Organization)(0xc006c53a40), (*structs.Organization)(0xc006c53ae0)}
        	            	actual  : []*structs.Organization{(*structs.Organization)(0xc005f24dc0), (*structs.Organization)(0xc005f24e60)}
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -5,3 +5,3 @@
        	            	   FullName: (string) (len=7) "User 17",
        	            	-  Email: (string) "",
        	            	+  Email: (string) (len=18) "user17@example.com",
        	            	   AvatarURL: (string) (len=79) "https://secure.gravatar.com/avatar/a52ccb1440980e69f85854c2a6019a8c?d=identicon",
        	            	@@ -18,3 +18,3 @@
        	            	   FullName: (string) (len=26) " <<<< >> >> > >> > >>> >> ",
        	            	-  Email: (string) "",
        	            	+  Email: (string) (len=17) "user3@example.com",
        	            	   AvatarURL: (string) (len=79) "https://secure.gravatar.com/avatar/97d6d9441ff85fdc730e02a6068d267b?d=identicon",
        	Test:       	TestMyOrgs

[denyskon]

@JakobDev I opened a PR to your branch: JakobDev#1

I fixed the failing test and also adjusted some styling to align icons properly. I think then the PR should be ready.

[JakobDev]

I looks like something gone wrong with your PR

[denyskon]

@JakobDev I resolved the conflict

[JakobDev]

I merged it now. Thanks.

See above

[wxiaoguang]

Let's use "Contact Email" and go on.

[delvh]

If I see that correctly, we don't need a migration.
LGTM as long as that is true.

[JakobDev]

The Organisation model is based on the User model, so it already has a EMail field. No Migration needed.