perf: optimize text rendering performance

src/shaders/text_f_shader.glsl

@@ -1,12 +1,14 @@
 #version 460
 
-in vec2 texCoord;
-out vec4 color;
+in vec2 tc;
+flat in int tex_layer;
 
-layout (binding = 0) uniform sampler2D text;
+layout (binding = 0) uniform sampler2DArray text;
 uniform vec3 textColor;
 
+out vec4 color;
+
 void main(void) {
-    vec4 smapled = vec4(1.0, 1.0, 1.0, texture(text, texCoord).r);
+    vec4 smapled = vec4(1.0, 1.0, 1.0, texture(text, vec3(tc, tex_layer)).r);
     color = vec4(textColor, 1.0) * smapled;
 }