[feature]: Customized Branding with Organization Logo and Name

Is there an existing issue for this? • I have searched the existing issues Summary I would like to request a feature to allow customized branding for organizations using Plane. This feature would enable users to upload their organization’s logo and set a custom name, which would be reflected throughout the user interface (UI). The branding changes would replace the default "Plane" branding with the organization-specific details, similar to how GitLab supports custom branding for self-hosted instances. Use Case: Organizations that deploy Plane for their internal use would benefit from having their own branding visible across the platform, making it feel more integrated with their existing systems and enhancing the user experience. Proposed Features: Ability to upload an organization logo (which can be shown in the UI, including in the header, login screen, and any other relevant sections). Set a custom organization name that replaces any default "Plane&q…