Migrate LayoutTensor to TileTensor

[dunnoconnor]

Migrate from LayoutTensor to TileTensor

This PR replaces all uses of the deprecated LayoutTensor API with TileTensor across problems, solutions, and documentation.

Code changes

• All problem files (p05–p34) and solution files: Replaced LayoutTensor with TileTensor throughout. Updated imports, type annotations, stack_allocation calls, and copy_dram_to_sram_async usages.
• Deleted separate _layout_tensor.mojo files for p05, p07, p08, p11, p12 (in both problems/ and solutions/). Their content has been consolidated into the single p.mojo file for each puzzle (two-approach format: UnsafePointer + TileTensor).
• Renamed p04_layout_tensor.mojo → p04_tile_tensor.mojo in both problems/p04/ and solutions/p04/.

Tests

• Added tests/canary_tile_tensor.mojo (266 lines): validates the full TileTensor API surface needed for the migration — basic indexing, shared memory via stack_allocation, async DRAM→SRAM copy, 2D indexing, and MutAnyOrigin/ImmutAnyOrigin origins.
• Added tests/test_origin_fix.mojo (26 lines): targeted test for origin tracking correctness.

Documentation (English + Korean)

• Renamed introduction_layout_tensor.md → introduction_tile_tensor.md and layout_tensor_preview.md → tile_tensor_preview.md in puzzle_04 docs.
• Renamed layout_tensor.md → tile_tensor.md in puzzle_04.
• For puzzles 05, 07, 08, 11, 12: merged content from separate layout_tensor.md and raw.md files into the main puzzle_XX.md, then deleted the now-redundant files.
• Updated all remaining doc files to reference TileTensor instead of LayoutTensor.
• Updated SUMMARY.md (English + Korean) to reflect renamed doc files.

pixi.toml

• Renamed p04_layout_tensor task → p04_tile_tensor; layout_tensor_intro → tile_tensor_intro.
• Removed p05_layout_tensor, p07_layout_tensor, p08_layout_tensor, p11_layout_tensor, p12_layout_tensor tasks (files deleted).

[GzuPark]

I didn't build the docs locally to check the Korean files. I only read the diff on GitHub, and the expressions looked fine to me.

I will also check how the original content has changed and review it again later. If I find anything that needs to be fixed, I will open a new PR.

Thank you for updating the Korean version together! 😄

[BradLarson]

In switching to the TileTensor-primary file here, this drops the intro and broadcasting definition that we had in the previous non-TileTensor document. Should those be re-added into the TileTensor one to provide the intro content here?

[dunnoconnor]

Good catch! Pushed a few commits to resolve this and your other comments.

[BradLarson]

Sorry, this might also be another file left over from debugging during migration.