fix: Add missing media-queries and resources for PWA splash screen

[taefi]

Description

Missing media queries and meta resources
caused the PWA splash screen not to show
up on Apple devices.

Fixes: #13617

Type of change

• Bugfix
• Feature

Checklist

• I have read the contribution guide: https://vaadin.com/docs/latest/guide/contributing/overview/
• I have added a description following the guideline.
• The issue is created in the corresponding repository and I have referenced it.
• I have added tests to ensure my change is effective and works as intended.
• New and existing tests are passing locally with my change.
• I have performed a self-review and corrected misspellings.

[github-actions]

Unit Test Results

   972 files  +23     972 suites  +23   53m 54s ⏱️ + 5m 12s
6 311 tests +28  6 263 ✔️ +28  48 💤 ±0  0 ❌ ±0 
6 541 runs  +60  6 487 ✔️ +60  54 💤 ±0  0 ❌ ±0 

Results for commit dfd3ec5. ± Comparison against base commit 570244d.

♻️ This comment has been updated with latest results.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[vaadin-bot]

Hi @taefi and @mshabarov, when i performed cherry-pick to this commit to 2.8, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick e0c2c70
error: could not apply e0c2c70... fix: Add missing media-queries and resources for PWA splash screen (#13923)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[vaadin-bot]

Hi @taefi and @mshabarov, when i performed cherry-pick to this commit to 2.7, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick e0c2c70
error: could not apply e0c2c70... fix: Add missing media-queries and resources for PWA splash screen (#13923)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".