Redesign repo header with following new aspects: - responsive & better-looking repo title - hide repo button text instead of icons in mobile view - use same tab style as on explore and org page <details> <summary>Before:</summary> ![grafik](https://github.com/go-gitea/gitea/assets/47871822/57360b77-d43c-49ac-b798-2363c03da7ec) ![grafik](https://github.com/go-gitea/gitea/assets/47871822/d4117f79-a5f5-4f36-bf65-bbada3e7e73b) ![grafik](https://github.com/go-gitea/gitea/assets/47871822/e26f967f-e264-4337-9925-3d942e04fd6d) ![grafik](https://github.com/go-gitea/gitea/assets/47871822/b4683c8d-9c6a-4089-afa7-8dd219e43a46) </details> <details> <summary>After:</summary> ![grafik](https://github.com/go-gitea/gitea/assets/47871822/8ddbc9f6-53c7-4e4e-bea9-704fd93524ca) ![grafik](https://github.com/go-gitea/gitea/assets/47871822/c0588aa9-788d-469c-98a0-81484fbd220c) ![grafik](https://github.com/go-gitea/gitea/assets/47871822/206e931e-404d-4d1b-92ce-908698addfcc) ![grafik](https://github.com/go-gitea/gitea/assets/47871822/a508f9c8-fadc-4a85-94ba-18796f77e07b)