Provide text rendering.

[Adnn]

• [x] Restore scoped binds
• [x] Dynamically bind the sampler uniform
• [x] Control font size
• [x] Whole string transformations (position, scale and rotation)
• [x] Understand the glyph map not starting where requested
• [ ] Address the margins on X being 2, should be 1 (for the same result, 1 on each side)