[mmporong]

Description

Four doc links point to files that do not exist, so Sphinx renders them as dead in-page anchors on docs.flame-engine.org. For example, the camera page links to href="#effects.md".

• flame/camera.md: effects.md → effects/effects.md
• tutorials/basic_shader/basic_shader.md: bare_flame_game.md → ../bare_flame_game.md
• tutorials/platformer/step_4.md: both "docs" links pointed to ../../flame/effects.md#sizeeffectby. The SizeEffect one now points to ../../flame/effects/size_effects.md#sizeeffect-by, and the one in the paragraph about the water drop's MoveEffect.by now points to ../../flame/effects/move_effects.md#movebyeffect. The anchors are the ids the live pages use. I rewrapped the first of these lines to stay within the 100-character limit.

I found them by checking every relative .md link under doc/ for a target file and heading. markdownlint-cli2 with the repo's .markdownlint.yaml reports no issues on the three files.

Checklist

• I have followed the Contributor Guide when preparing my PR.
• [-] I have updated/added tests for ALL new/updated/fixed functionality.
• I have updated/added relevant documentation in docs and added dartdoc comments with ///.
• [-] I have updated/added relevant examples in examples or docs.

Breaking Change?

• Yes, this PR is a breaking change.
• No, this PR is not a breaking change.

Related Issues

[spydon]

Thanks for your contribution