* feat:Add opt‑in navigation handler for external URLs (#5531)
* add navigation handler config option
code from https://github.com/DioxusLabs/dioxus/pull/5231
* Re-order branches
The branches should be reorder so that the branch that checks for
the index and assets is always taken first. Otherwise, they will
fail to load for users who forget to allow them in their custom
handlers, which will be a crappy experience and hard to debug.
* remove return
* Change behavior when handler not set
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Co-authored-by: not a cow <agielow@proton.me>
* fix: allow navigations but disallow external nav
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Co-authored-by: Martin Martinez Rivera <mrtnz.rvr@gmail.com>
Co-authored-by: not a cow <agielow@proton.me>
