Update sourcemap-codec package import usage

Author: SiNONiMiTY

src/shared/svelte-compile-warns/index.ts

@@ -1,7 +1,7 @@
 import type { AST } from "svelte-eslint-parser"
 import * as compiler from "svelte/compiler"
-import type { SourceMapMappings } from "sourcemap-codec"
-import { decode } from "sourcemap-codec"
+import type { SourceMapMappings } from "@jridgewell/sourcemap-codec"
+import { decode } from "@jridgewell/sourcemap-codec"
 import type { RuleContext } from "../../types"
 import { LinesAndColumns } from "../../utils/lines-and-columns"
 import type { TransformResult } from "./transform/types"