chore: Re-add changefiles from #416 and #422 (#457)

This reverts commit 8916544034.

.changes/stronghold-arg-name.md

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+---
+"stronghold-js": patch
+---
+
+Change the argument name of the `Stronghold.remove` from `location` to `recordPath` to match the Stronghold command argument

.changes/stronghold-constructor.md

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+---
+"stronghold-js": minor
+---
+
+Added `Stronghold.load` and removed its constructor.