Lua_api.txt: Move item def section nearby node def (#7636)

doc/lua_api.txt

@@ -5414,6 +5414,62 @@ Used by `minetest.register_lbm`.
        action = func(pos, node),
    }

Tile definition
---------------

* `"image.png"`
* `{name="image.png", animation={Tile Animation definition}}`
* `{name="image.png", backface_culling=bool, tileable_vertical=bool,
  tileable_horizontal=bool, align_style="node"/"world"/"user", scale=int}`
    * backface culling enabled by default for most nodes
    * tileable flags are info for shaders, how they should treat texture
      when displacement mapping is used.
      Directions are from the point of view of the tile texture,
      not the node it's on.
    * align style determines whether the texture will be rotated with the node
      or kept aligned with its surroundings. "user" means that client
      setting will be used, similar to `glasslike_framed_optional`.
      Note: supported by solid nodes and nodeboxes only.
    * scale is used to make texture span several (exactly `scale`) nodes,
      instead of just one, in each direction. Works for world-aligned
      textures only.
      Note that as the effect is applied on per-mapblock basis, `16` should
      be equally divisible by `scale` or you may get wrong results.
* `{name="image.png", color=ColorSpec}`
    * the texture's color will be multiplied with this color.
    * the tile's color overrides the owning node's color in all cases.
* deprecated, yet still supported field names:
    * `image` (name)

Tile animation definition
-------------------------

    {
        type = "vertical_frames",

        aspect_w = 16,
        -- Width of a frame in pixels

        aspect_h = 16,
        -- Height of a frame in pixels

        length = 3.0,
        -- Full loop length
    }

    {
        type = "sheet_2d",

        frames_w = 5,
        -- Width in number of frames

        frames_h = 3,
        -- Height in number of frames

        frame_length = 0.5,
        -- Length of a single frame
    }

Item definition
---------------

@@ -5530,62 +5586,6 @@ Used by `minetest.register_node`, `minetest.register_craftitem`, and
        -- usage.
    }

Tile definition
---------------

* `"image.png"`
* `{name="image.png", animation={Tile Animation definition}}`
* `{name="image.png", backface_culling=bool, tileable_vertical=bool,
  tileable_horizontal=bool, align_style="node"/"world"/"user", scale=int}`
    * backface culling enabled by default for most nodes
    * tileable flags are info for shaders, how they should treat texture
      when displacement mapping is used.
      Directions are from the point of view of the tile texture,
      not the node it's on.
    * align style determines whether the texture will be rotated with the node
      or kept aligned with its surroundings. "user" means that client
      setting will be used, similar to `glasslike_framed_optional`.
      Note: supported by solid nodes and nodeboxes only.
    * scale is used to make texture span several (exactly `scale`) nodes,
      instead of just one, in each direction. Works for world-aligned
      textures only.
      Note that as the effect is applied on per-mapblock basis, `16` should
      be equally divisible by `scale` or you may get wrong results.
* `{name="image.png", color=ColorSpec}`
    * the texture's color will be multiplied with this color.
    * the tile's color overrides the owning node's color in all cases.
* deprecated, yet still supported field names:
    * `image` (name)

Tile animation definition
-------------------------

    {
        type = "vertical_frames",

        aspect_w = 16,
        -- Width of a frame in pixels

        aspect_h = 16,
        -- Height of a frame in pixels

        length = 3.0,
        -- Full loop length
    }

    {
        type = "sheet_2d",

        frames_w = 5,
        -- Width in number of frames

        frames_h = 3,
        -- Height in number of frames

        frame_length = 0.5,
        -- Length of a single frame
    }

Node definition
---------------