Add performance tips to cudf.pandas FAQ.

[bdice]

Description

This PR adds a section with performance tips to the cudf.pandas FAQ.

I based this section on some common user questions about performance, to make it clearer that cudf.pandas is designed for optimal performance with large data sizes and provide some alternatives for common needs where cudf or cudf.pandas aren't the best fit. See these links for examples:

• [QST] How to improve performance of cudf.pandas df1.add(df2) #14548 (comment)
• [QST] Is cuDF slow if there are many columns? (pandas, numpy, polars, cuDF Comparison) #16065
• https://stackoverflow.com/questions/78626099/cudf-is-very-slow

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[bdice]

@KyleFromNVIDIA This is my first docs-only PR since we merged #16642. I am seeing an error:

Run tj-actions/changed-files@v45
changed-files
  Using local .git directory
  Running on a push event...
  Repository is shallow, fetching more history...
  Error: Not Found - https://docs.github.com/rest/git/refs#get-a-reference

[Matt711]

@KyleFromNVIDIA This is my first docs-only PR since we merged #16642. I am seeing an error:

Run tj-actions/changed-files@v45
changed-files
  Using local .git directory
  Running on a push event...
  Repository is shallow, fetching more history...
  Error: Not Found - https://docs.github.com/rest/git/refs#get-a-reference

I saw this error yesterday, updating the branch fixed it.

[vyasr]

@KyleFromNVIDIA This is my first docs-only PR since we merged #16642. I am seeing an error:

Run tj-actions/changed-files@v45
changed-files
  Using local .git directory
  Running on a push event...
  Repository is shallow, fetching more history...
  Error: Not Found - https://docs.github.com/rest/git/refs#get-a-reference

I saw this error yesterday, updating the branch fixed it.

This was fixed in #16709

[bdice]

I'm struggling here. I can't reproduce the error in docs builds locally:

/__w/cudf/cudf/docs/cudf/source/cudf_pandas/faq.md:33: WARNING: 'myst' cross-reference target not found: 'does-cudf-pandas-work-with-third-party-libraries'

[bdice]

I got the docs figured out. All looks good. I'll merge this now.

[bdice]

/merge