fix(led_strip): Update LedStrip to support DMA

[finger563]

Description

Update LedStrip to replace use of std::vector with a pointer + size approach for managing LED color data, and adds configuration options for whether to use DMA / allocation bits for the LED strip.

Motivation and Context

Closes #582 - allowing the LedStrip to be DMA-accelerated.

How has this been tested?

Tested on actual hardware with both DMA and non-DMA configurations, ensuring correct LED color output in both cases.

Screenshots (if appropriate, e.g. schematic, board, console logs, lab pictures):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Hardware (schematic, board, system design) change
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• I have updated the .github/workflows/build.yml file to add my new test to the automated cloud build github action.
• All new and existing tests passed.
• My code follows the code style of this project.

[github-actions]

✅Static analysis result - no issues found! ✅

[Copilot]

Pull request overview

This pull request updates the LedStrip component to support DMA-accelerated memory allocation for improved performance with LED strip control. The change replaces std::vector<uint8_t> with manual memory management using raw pointers, allowing the use of ESP-IDF's heap capabilities API to allocate DMA-capable memory when needed.

Changes:

• Replaced std::vector<uint8_t> with raw pointer + size for LED data buffer management
• Added configuration options use_dma and dma_allocation_flags to control DMA memory allocation
• Implemented proper move semantics (copy constructor/assignment deleted, move constructor/assignment added)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 10 comments.

File	Description
components/led_strip/include/led_strip.hpp	Core implementation: replaced vector with manual memory management, added DMA support configuration, implemented move semantics, updated methods to work with raw pointers
components/led_strip/example/main/led_strip_example.cpp	Updated example to demonstrate DMA usage with RMT peripheral
components/led_strip/CMakeLists.txt	Added "heap" dependency for heap_caps_malloc API

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