use pypi.io url instead of api, support update checksum for pypi, add doc

[stdmnpkg]

No description provided.

[what-the-diff]

PR Summary

• Improved Flexibility in Checksum Calculation
  The calculate_checksum function has been updated to now include 'pypi' types in its processing list. This enhancement extends its ability to handle PyPI packages, thus making the tool more versatile.

• Enhanced Documentation in appendix.rst

  • The section about "Acceptable Prefixes for SRCS" has been reformatted. The new structure is easier to understand, making it more user-friendly.
  • A new addition was made in the table namely pypi. It stands for "PyPI Package Source Code (Remote Files)". However, it's important to note that auto-deduction functionality does not apply to this prefix.

[MingcongBai]

The switch to URL concatenation sounds good to me, as this is usually a fairly safe choice and much simpler than playing with API.

[stdmnpkg]

tested with AOSC-Dev/aosc-os-abbs#8352

studentmain@MeowPC3E [ acbs@pypi-doc-chksum ] $  cd /home/studentmain/Documents/acbs ; /usr/bin/env /bin/python3 /home/studentmain/.vscode/extensions/ms-python.debugpy-2024.12.0-linux-x64/bundled/libs/debugpy/adapter/../../debugpy/launcher 44407 -- acbs-build -gwdc -l /tmp/acbs/dump -o /tmp/acbs/log -z /tmp/acbs/temp -b /home/studentmain/Documents/ciel/TREE random2 
Build directory clean, no need to clear...
---------------------------------------------------------------------------------- Welcome to ACBS - 20241018 ----------------------------------------------------------------------------------
[INFO]: Searching and resolving dependencies...
[DEBUG]: Finding random2...
[DEBUG]: Parsing /home/studentmain/Documents/ciel/TREE/lang-python/random2/autobuild...
[DEBUG]: Checking if python-3 is installed
[DEBUG]: Checking if setuptools is installed
[DEBUG]: Filtering packages...
[DEBUG]: Converting queue into adjacency graph...
[DEBUG]: Running Tarjan search...
[1/1] random2                       
[INFO]: Dependencies resolved, 1 packages in the queue
[DEBUG]: Queue: [<ACBSPackageInfo random2: deps: [] ; uri: [<ACBSSourceInfo pypi: random2:[email protected] integrity: ('sha256', '3754fcef48267567cd5705fa7da6bbc3809cb3f808740313e6705acc3c057e77')>]>]
[INFO]: Packages to be built: random2
[INFO]: Building random2 (1/1)...
[INFO]: Fetching required source files...
[INFO]: Fetching source (1/1)...
--2024-10-23 15:32:58--  https://pypi.io/packages/source/r/random2/random2-1.0.2.tar.gz
Resolving pypi.io (pypi.io)... 151.101.128.223, 151.101.0.223, 151.101.192.223, ...
Connecting to pypi.io (pypi.io)|151.101.128.223|:443... connected.
HTTP request sent, awaiting response... 301 Redirect to Primary Domain
Location: https://pypi.org/packages/source/r/random2/random2-1.0.2.tar.gz [following]
--2024-10-23 15:32:59--  https://pypi.org/packages/source/r/random2/random2-1.0.2.tar.gz
Resolving pypi.org (pypi.org)... 151.101.128.223, 151.101.0.223, 151.101.192.223, ...
Connecting to pypi.org (pypi.org)|151.101.128.223|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://files.pythonhosted.org/packages/source/r/random2/random2-1.0.2.tar.gz [following]
--2024-10-23 15:33:00--  https://files.pythonhosted.org/packages/source/r/random2/random2-1.0.2.tar.gz
Resolving files.pythonhosted.org (files.pythonhosted.org)... 151.101.108.223, 2a04:4e42:1a::223
Connecting to files.pythonhosted.org (files.pythonhosted.org)|151.101.108.223|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://files.pythonhosted.org/packages/c2/f8/aba7ea7900492da2dd405aa42aa6160b83490421c7d70cf2d5aa44238a13/random2-1.0.2.tar.gz [following]
--2024-10-23 15:33:01--  https://files.pythonhosted.org/packages/c2/f8/aba7ea7900492da2dd405aa42aa6160b83490421c7d70cf2d5aa44238a13/random2-1.0.2.tar.gz
Reusing existing connection to files.pythonhosted.org:443.
HTTP request sent, awaiting response... 200 OK
Length: 18095 (18K) [application/octet-stream]
Saving to: ‘/tmp/acbs/dump/e1b74f6357dbdd0e03ad26afaab04071964ef1c9a0f0abf10edb060e06c890a0.tar.gz’

/tmp/acbs/dump/e1b74f6357dbdd0e03ad26afaab04071 100%[=======================================================================================================>]  17.67K  58.8KB/s    in 0.3s    

2024-10-23 15:33:02 (58.8 KB/s) - ‘/tmp/acbs/dump/e1b74f6357dbdd0e03ad26afaab04071964ef1c9a0f0abf10edb060e06c890a0.tar.gz’ saved [18095/18095]

[INFO]: Updated checksum for random2

========================================
    ACBS Build Successful
========================================

Package(s) built:
random2         Download only