render: split module into gfx_apis and renderer

src/portal/ptr_gui.rs

@@ -4,9 +4,10 @@ use {
         cursor::KnownCursor,
         fixed::Fixed,
         format::ARGB8888,
+        gfx_apis::gl::{Framebuffer, RenderContext, Texture},
         ifs::zwlr_layer_shell_v1::OVERLAY,
         portal::ptl_display::{PortalDisplay, PortalOutput, PortalSeat},
-        render::{Framebuffer, RenderContext, RendererBase, Texture},
+        renderer::renderer_base::RendererBase,
         scale::Scale,
         text::{self, TextMeasurement},
         theme::Color,