fix(git_status): parse NUL-delimited git status output

Problem: `git status --porcelain` will wrap file paths with "special
characters" (eg `\n`, spaces) in double quotes which complicates
downstream parsing of results.

Furthermore, if a file path HAS a newline char, the existing approach
for getting results by splitting by `\n` is completely broken.

Solution: Switch to `git status -z`.
`-z` is more machine parse-able than plain `--porcelain` as git will no
longer treat paths with special characters specially, delimiting results
by NUL (the only non-valid character in unix paths) rather than LF while
keeping the benefit of `--porcelain` (stable across git versions and
user config).
Adds support for this in `async_oneshot_finder`/`LinesPipe` via a
new `split_char` option.

docs(readme): simplify installation instructions

* drop legacy plugin managers (no longer very relevant for new installs)
* pin to latest stable tag (so we don't have to keep updating these
  numbers)

Follow-up: Switch to `vim.pack` when Nvim 0.12 is released.

release v0.2.0

fix(lsp): use correct error field in client request result (#3554)

Also improve some annotations.

fix(builtin.spell_suggest): ciw into black hole register (#3124)

(cherry picked from commit 5665d93)

chore: add neovim v0.10.0 to ci matrix (#3121)

(cherry picked from commit 4aed639)

docs(git_status): add missing opt `expand_dir` (#2824)

* docs(git_status): add missing opt `expand_dir`

* [docgen] Update doc/telescope.txt
skip-checks: true

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Co-authored-by: Github Actions <actions@github>
(cherry picked from commit fa4d663)

fix: check if cmd extension can be loaded - fix lazy loading of exten…

…sions (#2655)

As a last resort if no other cmd is found in `run_cmd`, check
if the command can be loaded as an extension.

(cherry picked from commit a197706)

fix: correctly create User autocmd in action.which_key (#2736)

(cherry picked from commit 550055e)

fix(internal.resume): dynamic_preview_title was not respected and tit…

…le became static (#2696)

* fix(internal.resume): dynamic_preview_title was not respected and title became static

* run stylua

(cherry picked from commit 3d8e051)