chore: Merge branch v1 into v2 (tauri-apps#702)

Author: FabianLars

.changes/sql-decode-floats.md

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+---
+"sql": patch
+---
+
+Fixed an issue where float-like values were decoded as `null`.

.changes/stronghold-argon2.md

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+---
+"stronghold": patch
+---
+
+Added `Builder::with_argon2`.

.changes/tray-position.md

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+---
+"positioner": patch
+---
+
+`TrayLeft`, `TrayRight` and `TrayCenter` will now position the window according to the tray position relative to the monitor dimensions to prevent windows being displayed partially off-screen.

.changes/upload-bufwriter.md

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+---
+"upload": patch
+---
+
+Use `BufWriter` to reduce IO calls.

.changes/websocket-headers.md

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+---
+"websocket": patch
+"websocket-js": patch
+---
+
+Add support for custom request headers.