Now that ubuntu-24 is out of beta at Github

Since for ubuntu_build, we only use one OS version
and the changes between versions are not as drastic as with MacOS,
it seems safe to have it upgrade automatically.

Only CPython scripts use bundled dependencies for MacOS and two alternative tarballs

* report more progress
* don't download SHA files for unsupported architectures

* future-proof PyVersion
* fix handling "-latest"
* Update default versions
* change -v argument to bool

* perf: replace a series of if statements with a case block. Add error
handling for case where unknown option is provided.
Same setup as rbenv-init for reading arguments.

* perf, docs: Recommend users to specify the shell for `pyenv init -`
Speeds up the startup by about 40% (in local testing, from ~50ms to ~30ms).
Reflect this in `pyenv init` hint text.

* style: remove unnecessary `root` variable in pyenv-init
* style: remove unnecessary variable declarations at the top of file in pyenv-init.

* perf: replace `cat <<` calls with `echo`
The builtin `echo` is about 100x faster. In tests, saves about 2-3ms.

* docs: document the `pyenv init - <shell>` performance boost in the Advanced Configuration section.

* style: test_helper.bash: avoid unnecessary ".." in produced PATH

* docs: fix a false statement about completions location in the Advanced Configuration section.

Co-authored-by: binbjz <zhaobin@avenir.hk>

Addendum to #3134 as per https://github.com/pyenv/pyenv/pull/3134#issuecomment-2545710044

Requested in https://github.com/pyenv/pyenv/issues/2680
for deployments with a stock `.pyenv-version` that can use any
of a number of Python versions
and for compatibility with `uv`.

* Support `pyenv local --force`
* Support `pyenv-version-file-write --force`
* Support `pyenv version-name --force`
* Ignore missing versions when searching for executables
* Display "commmand not found" even when there are nonexistent versions

* exec.bats: replace `python` and `rspec` with something that doesn't exist globally, either
in Ubuntu Github CI, `python` exists globally

`shell` does not fall through to `local`, and `local to `global`.

There's a complaint that this results in duplicate PATH entries in nested shells, will deal with that separately

add test to test all the flag types

Co-authored-by: native-api <vano@mail.mipt.ru>

missed some of the changes

* Skip building bundled OpneSSL unnecessary parts
* Remove bundled OpneSSL build hack: no longer needed

Add CPython 3.9.21, 3.10.16, 3.11.11, 3.12.8 and 3.13.1

HTML and Markdown need to be separated by an empty line to co-exist, otherwise the Markdown isn't parsed correctly.

* Reorganize readme, add gif

1. Details in 'Getting Pyenv' and 'Setup for your shell' are collapsed. User can expand relevant
   sections depending on their platform and shell.

2. 'How It Works' and 'Advanced Configuration' are moved to the bottom of the README.md
   just before 'Contributing' section at the end.

3. Added a GIF in the 'Usage' section to showcase
   - Listing python versions available for install.
   - Installing a specific python version.
   - Listing installed python versions.
   - Switching to another python version for a directory.
   - Testing by moving terminal into the directory and moving back.

* Update GIF to show prefix resolution

* Collapse upgrade notes

* Cross-mention Linux and MacOS instlalation scenarios

---------

Co-authored-by: Ivan Pozdeev <vano@mail.mipt.ru>

Add Anaconda3-2024.10-1

Co-authored-by: binbjz <zhaobin@avenir.hk>