fix: improve domain method to handle forcedRoot and return cleaned URL

[mrfade]

Fix: incorrect URLs when forceRoot is set

When forceRoot was used, Route::domain() returned the full root including the scheme. Since uri() prepends the scheme separately, this resulted in broken URLs like https://https//site.com/..., especially when forceScheme was also applied.

This change makes domain() return only the host part of forcedRoot (without http:// or https://). That way, combining it with scheme() produces a valid URL.

This also fixes the issue reported in Issue #102

[Manavsaliya]

i think you can change Issue #102 to Fix #102 on last line

and you should write test cases for this issue