Make Theseus compilable out of the box again, update Tauri to 1.0.4

Changes made:
- migrate to Vite 3 (Svelte Kit errors out and forces you to migrate)
- bumped unplugin-icons to 0.14.7 (Vite 3 support)
- disable strict-peer-dependencies (changes needed in omorphia - unplugin-icons there requires Vite 2)
- bumped Tauri to 1.0.4 (finally stable!)
- removed useBootstrapper (removed in v1.0.0-rc.5)
- migrated from create_window to setup (removed in v1.0.0-rc.7)
- replaced %svelte% with %sveltekit% (renamed in SvelteKit 1.0.0-next.339)

Notes:
- Vite 3 exposes its dev server on port 5173.

theseus_gui/src-tauri/Cargo.toml

@@ -8,12 +8,12 @@ rust-version = "1.57"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [build-dependencies]
-tauri-build = { version = "1.0.0-rc.3", features = [] }
+tauri-build = { version = "1.0.4", features = [] }
 
 [dependencies]
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
-tauri = { version = "1.0.0-rc.3", features = ["api-all"] }
+tauri = { version = "1.0.4", features = ["api-all"] }
 
 [features]
 # by default Tauri runs in production mode