feat(lua): add pocket dimension travel bindings

[scarf005]

Purpose of change (The Why)

Sky Island needs Lua-visible dimension helpers to move its home island into a pocket dimension without reimplementing engine-side travel logic.

Describe the solution (The How)

• add gapi.get_current_dimension_id() and gapi.place_player_dimension_at( { ... } )
• add Map:get_bound_dimension() and Map:is_out_of_bounds()
• document example usage in the Lua cookbook in English, Korean, and Japanese

Example:

local entered = gapi.place_player_dimension_at({
  dimension_id = "sky_island_home",
  target_omt = Tripoint.new(0, 0, 0),
  world_type = "pocket_dimension",
  bounds_min_omt = Tripoint.new(-2, -2, 0),
  bounds_max_omt = Tripoint.new(2, 2, 0),
})

Testing

• cmake --build --preset linux-full --target astyle
• cmake --build --preset linux-full --target cataclysm-bn-tiles cata_test-tiles
• ./out/build/linux-full/tests/cata_test-tiles "[lua]"
• deno fmt docs/en/mod/lua/guides/cookbook.md docs/ko/mod/lua/guides/cookbook.md docs/ja/mod/lua/guides/cookbook.md

Checklist

Mandatory

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax like closes #1234 in Summary of the PR so it can be closed automatically.
• I've committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.

Optional

• This is a C++ PR that modifies JSON loading or behavior.
  • I have documented the changes in the appropriate location in the docs/ folder.
• This is a PR that modifies lua scripts or the lua API.
  • I have added lua scope to the PR title.
  • I have added type annotations to functions so that it's safe and easy to maintain.