Upgrade Effect v4 beta compatibility and refresh package branding (#8)

# PR description

## Summary

- Upgrade the Effect v4 package from `4.0.0-beta.98` to `4.0.0-beta.101`.
- Bump `effect-lens-next` to `2.0.0-beta.101`.
- Normalize the v4 `LensImpl` and `ViewImpl` global symbol keys under the `@effect-lens` namespace.
- Upgrade the monorepo toolchain, including TypeScript 7, Turbo, Biome, the Effect language service, and npm-check-updates.
- Refresh the lockfile with the updated dependency graph.
- Add new wide and square Effect Lens SVG branding.
- Improve both npm README headers with:
  - The new square logo.
  - Package version, download, license, and Effect compatibility badges.
  - Clear warnings distinguishing the Effect v3 stable release from the Effect v4 beta.
- Include the square logo in both published npm packages.

## Validation

- TypeScript checks pass.
- Both SVG assets validate successfully.
- `npm pack --dry-run --ignore-scripts` succeeds for both packages.
- Both npm tarballs include their relative README logo assets.

---------

Co-authored-by: Julien Valverdé <julien.valverde@mailo.com>
Reviewed-on: #8

package.json

@@ -15,12 +15,12 @@
     "clean:modules": "turbo clean:modules && rm -rf node_modules"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.4.16",
-    "@effect/language-service": "^0.86.2",
+    "@biomejs/biome": "^2.5.5",
+    "@effect/language-service": "^0.87.1",
     "@types/bun": "^1.3.14",
-    "npm-check-updates": "^22.2.1",
+    "npm-check-updates": "^23.0.0",
     "npm-sort": "^0.0.4",
-    "turbo": "^2.9.16",
-    "typescript": "^6.0.3"
+    "turbo": "^2.10.7",
+    "typescript": "^7.0.2"
   }
 }