Add .point_size attribute modifier for fonts

[andrewhong04]

Original PR: pygame/pygame#3688

This pull request has been significantly improved since its original state.

Video

Test code

import pygame
import sys

pygame.init()
screen = pygame.display.set_mode((690, 690))

font = pygame.font.Font(None, 10)

while True:
    for x in pygame.event.get():
        if x.type == pygame.QUIT:
            sys.exit()
        if x.type == pygame.KEYUP:
            if x.key == pygame.K_UP:
                # font.set_pointsize(font.get_pointsize() + 10)
                font.pointsize += 10
            if x.key == pygame.K_DOWN:
                # font.set_pointsize(font.get_pointsize() - 10)
                font.pointsize -= 10

    screen.fill((0, 0, 0))
    screen.blit(font.render("among us is real", True, (255, 255, 255)), (250, 250))
    
    pygame.display.flip()

[MyreMylar]

I'd like to put this in 2.1.4, because it is font related - if you can get it working.

[MyreMylar]

This works well in my testing 👍 Nice work and thanks for fixing it up.

I have some style and philosophical(?) quibbles that you may, or may not, agree with so I'm leaving this review on comment for now.

[Starbuck5]

I believe we should call this “size” to match the existing freetype attribute.

[andrewhong04]

I believe we should call this “size” to match the existing freetype attribute.

@Starbuck5 and I were in call and realized that font.size is already taken.

[andrewhong04]

Whoops, I've been in hiatus for a while. I've pushed some commits resolving some reviews.

[Starbuck5]

Thanks!

I've noticed this raises a deprecation warning if you give it a float, and the SDL_TTF_VERSION_ATLEAST could be relaxed around getters. But that can be fixed in the future.