pypi_riscv64_check: add binary wheel checker script

[threexc]

Create a basic script to check PyPI for the top-30 binary wheels by download count according to: https://github.com/hugovk/top-pypi-packages

AI-Generated: Uses Claude (Sonnet 4.6)

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Here is an example of the output:

tgamblin@alchemist ~/workspace/baylibre/rise/python-wheels (tgamblin/pypi_riscv64_check)$ python scripts/pypi_riscv64_check.py
Fetching top-packages dataset …
  Dataset last updated: 2026-06-01 06:34:07
  Scanning for top 30 binary-wheel packages …

  [ 1] charset-normalizer                        ✓ riscv64
  [ 2] cryptography                              ✗ NO riscv64
  [ 3] pyyaml                                    ✗ NO riscv64
  [ 4] cffi                                      ✗ NO riscv64
  [ 5] numpy                                     ✗ NO riscv64
  [ 6] pydantic-core                             ✓ riscv64
  [ 7] protobuf                                  ✗ NO riscv64
  [ 8] pandas                                    ✗ NO riscv64
  [ 9] markupsafe                                ✓ riscv64
  [10] aiohttp                                   ✓ riscv64
  [11] yarl                                      ✓ riscv64
  [12] multidict                                 ✗ NO riscv64
  [13] propcache                                 ✓ riscv64
  [14] frozenlist                                ✗ NO riscv64
  [15] rpds-py                                   ✓ riscv64
  [16] pillow                                    ✗ NO riscv64
  [17] greenlet                                  ✓ riscv64
  [18] grpcio                                    ✗ NO riscv64
  [19] wrapt                                     ✓ riscv64
  [20] pyarrow                                   ✗ NO riscv64
  [21] websockets                                ✗ NO riscv64
  [22] scipy                                     ✗ NO riscv64
  [23] sqlalchemy                                ✗ NO riscv64
  [24] tomli                                     ✗ NO riscv64
  [25] lxml                                      ✓ riscv64
  [26] psutil                                    ✗ NO riscv64
  [27] regex                                     ✓ riscv64
  [28] sglang                                    ✗ NO riscv64
  [29] watchfiles                                ✓ riscv64
  [30] jiter                                     ✓ riscv64

Rank  Package                                Downloads  Binary Wheels    riscv64
--------------------------------------------------------------------------------
1     charset-normalizer                         1.14B            127     ✓ (16)
2     cryptography                              952.0M             45          ✗
3     pyyaml                                    836.4M             72          ✗
4     cffi                                      800.8M             83          ✗
5     numpy                                     757.9M             43          ✗
6     pydantic-core                             730.0M            106      ✓ (6)
7     protobuf                                  642.5M              6          ✗
8     pandas                                    547.6M             47          ✗
9     markupsafe                                518.6M             88     ✓ (16)
10    aiohttp                                   452.6M            118     ✓ (12)
11    yarl                                      426.9M            102     ✓ (12)
12    multidict                                 420.4M            144          ✗
13    propcache                                 412.9M            119     ✓ (14)
14    frozenlist                                391.6M            128          ✗
15    rpds-py                                   385.6M            129      ✓ (9)
16    pillow                                    356.3M             90          ✗
17    greenlet                                  342.4M             78      ✓ (8)
18    grpcio                                    334.1M             50          ✗
19    wrapt                                     317.5M             88     ✓ (16)
20    pyarrow                                   312.7M             49          ✗
21    websockets                                310.6M             59          ✗
22    scipy                                     299.6M             40          ✗
23    sqlalchemy                                289.5M             56          ✗
24    tomli                                     282.7M             45          ✗
25    lxml                                      281.8M            133     ✓ (14)
26    psutil                                    277.3M             20          ✗
27    regex                                     272.5M            113     ✓ (14)
28    sglang                                    248.8M              8          ✗
29    watchfiles                                237.7M            106      ✓ (8)
30    jiter                                     228.1M            108      ✓ (7)

Packages WITHOUT riscv64 wheels (17/30):
  - cryptography
  - pyyaml
  - cffi
  - numpy
  - protobuf
  - pandas
  - multidict
  - frozenlist
  - pillow
  - grpcio
  - pyarrow
  - websockets
  - scipy
  - sqlalchemy
  - tomli
  - psutil
  - sglang

Out of this list, we are missing a task for tomli, so that will be added.