fix(dashboard): support more decimals for tx rates (#13407)

* Percentage formatter set maximum digits to 4

* Modify Tax Region Forms to allow 4 digits tax rates

* Add changeset

* Revert placeholder value to use only 2 decimals

* fix(dashboard): support more decimals for tx rates

* changeset

* bypass scale

* refactor

* fix removal of deprecated input

* cleanup deprecated percentage input

* small mistake in onchange

* add deprecated percentage input back

* import

* remove file extension

* frane comment

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Co-authored-by: AmbroziuBaban <ambroziubaban@gmail.com>

.changeset/large-months-yawn.md

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+---
+"@medusajs/dashboard": patch
+---
+
+fix(dashboard): support more decimals for tx rates