chore: stop emitting declarations from the esm and cjs build passes

`@rocket.chat/tsconfig/client.json` turns `declaration` and `declarationMap`
on, so all three `tsc` passes emitted `.d.ts` and `.d.ts.map` files. Only the
third one is referenced: `types` points at `dist/ts/index.d.ts`, leaving the
copies in `dist/esm` and `dist/cjs` as dead weight in the tarball. Turned off
for the two passes that only need JS, so `dist/ts` is the single source of
types.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: tassoevan

packages/storybook-dark-mode/tsconfig.cjs.json

@@ -4,7 +4,9 @@
 		"module": "commonjs",
 		"moduleResolution": "node",
 		"outDir": "./dist/cjs",
-		"rootDir": "./src"
+		"rootDir": "./src",
+		"declaration": false,
+		"declarationMap": false
 	},
 	"exclude": ["node_modules", "dist", "**/*.spec.*", "**/*.stories*"]
 }

packages/storybook-dark-mode/tsconfig.esm.json

@@ -4,7 +4,9 @@
 		"module": "ESNext",
 		"moduleResolution": "bundler",
 		"outDir": "./dist/esm",
-		"rootDir": "./src"
+		"rootDir": "./src",
+		"declaration": false,
+		"declarationMap": false
 	},
 	"exclude": ["node_modules", "dist", "**/*.spec.*", "**/*.stories*"]
 }