zlib:Support using Kconfig to control memory usage in zlib

[anjiahao1]

Summary

zlib:Support using Kconfig to control memory usage in zlib

Impact

zlib

Testing

qmeu with zlib

[nuttxpr]

[Experimental Bot, please feedback here]

No, this PR does not meet the NuttX requirements.

Here's why and how to improve it:

Missing Information

• Summary:
  • Why? What problem does this change solve? Why use Kconfig for this?
  • What/How? Be more specific. Which parts of zlib's memory usage are configurable? What are the Kconfig options?
• Impact:
  • You've only listed "zlib" as impacted, but not how. Does this change add a new feature? Optimize existing behavior?
  • Address all impact points (user adaptation, build process, hardware, documentation, security, compatibility). Even if the answer is "NO", state it explicitly.
• Testing:
  • Insufficient detail: "qemu with zlib" is not descriptive enough. Provide:
    • Specific QEMU machine type (e.g., qemu-system-arm -M versatilepb)
    • NuttX configuration used (boards/<arch>/<board>/configs/<config_name>.h)
    • Relevant log snippets: Only include the parts of the log that demonstrate the change's effect.

Example of an Improved PR Description

## Summary

This PR introduces Kconfig options to control zlib's memory usage, allowing users to tailor its footprint for memory-constrained systems. Specifically, it adds options for:

* Configuring the size of zlib's internal buffers.
* Enabling/disabling memory allocation strategies that trade off compression ratio for reduced memory consumption.

This change is motivated by [link to relevant NuttX issue, if any].

## Impact

* **Is new feature added?** YES - Fine-grained control over zlib's memory usage.
* **Impact on user?** YES - Users can now configure zlib's memory usage via Kconfig.  Documentation will be updated to describe the new options.
* **Impact on build?** NO
* **Impact on hardware?** NO 
* **Impact on documentation?** YES -  Documentation will be updated to describe the new Kconfig options and their impact on memory usage and compression performance.
* **Impact on security?** NO
* **Impact on compatibility?** NO
* **Anything else to consider?** N/A

## Testing

I confirm that changes are verified on the following setup:

* **Build Host:** Ubuntu 20.04, GCC 9.4.0
* **Target:** QEMU VersatilePB (ARM), `boards/arm/armv7-a/sim/configs/sim_smp.h`

**Testing logs before change:**

<relevant snippet showing zlib's memory usage without the Kconfig options>

**Testing logs after change:**

<relevant snippet showing zlib's memory usage with the new Kconfig options enabled>

By providing clear and comprehensive information, you make it easier for reviewers to understand and assess your PR.