Problem:  SpotBugs compiler can be improved
Solution: runtime(compiler): Improve defaults and error handling for
          SpotBugs; update test_compiler.vim (Aliaksei Budavei)

runtime(compiler): Improve defaults and error handling for SpotBugs

* Keep "spotbugs#DefaultPreCompilerTestAction()" defined but
  do not assign its Funcref to the "PreCompilerTestAction"
  key of "g:spotbugs_properties": there are no default and
  there can only be introduced arbitrary "*sourceDirPath"
  entries; therefore, this assignment is confusing at best,
  given that the function's implementation delegates to
  whatever "PreCompilerAction" is.

* Allow for the possibility of relative source pathnames
  passed as arguments to Vim for the Javac default actions,
  and the necessity to have them properly reconciled when
  the current working directory is changed.

* Do not expect users to remember or know that new source
  files ‘must be’ ":argadd"'d to be then known to the Javac
  default actions; so collect the names of Java-file buffers
  and Java-file Vim arguments; and let users providing the
  "@sources" file-lists in the "g:javac_makeprg_params"
  variable update these file-lists themselves.

* Strive to not leave behind a fire-once Syntax ":autocmd"
  for a Java buffer whenever an arbitrary pre-compile action
  errors out.

* Only attempt to run a post-compiler action in the absence
  of failures for a pre-compiler action.  Note that warnings
  and failures are treated alike (?!) by the Javac compiler,
  so when previews are tried out with "--enable-preview",
  remember about passing "-Xlint:-preview" too to also let
  SpotBugs have a go.

* Properly group conditional operators when testing for key
  entries in a user-defined variable.

* Also test whether "javaExternal" is defined when choosing
  an implementation for source-file parsing.

* Two commands are provided to toggle actions for buffer-local
  autocommands:
  - SpotBugsRemoveBufferAutocmd;
  - SpotBugsDefineBufferAutocmd.

For example, try this from "~/.vim/after/ftplugin/java.vim":
------------------------------------------------------------
if exists(':SpotBugsDefineBufferAutocmd') == 2
	SpotBugsDefineBufferAutocmd BufWritePost SigUSR1
endif
------------------------------------------------------------

And ":doautocmd java_spotbugs User" can be manually used at will.

closes: vim/vim#16140

https://github.com/vim/vim/commit/368ef5a48c7a41af7fe2c32a5d5659e23aff63d0

Co-authored-by: Aliaksei Budavei <0x000c70@gmail.com>

Dr. Chip retired some time ago and is no longer maintaining the netrw
plugin. However as a runtime plugin distributed by Vim, it important to
maintain the netrw plugin in the future and fix bugs as they are
reported.

So, split out the netrw plugin as an additional package, however include
some stubs to make sure the plugin is still loaded by default and the
documentation is accessible as well.

closes: vim/vim#16368

https://github.com/vim/vim/commit/9cfdabb074feefc9848e9f7a4538f201e28c7f06

Co-authored-by: Luca Saccarola <github.e41mv@aleeas.com>

We currently enable the OSC 52 clipboard provider by setting g:clipboard
when a list of conditions are met, one of which is that $SSH_TTY must be
set. We include this condition because often OSC 52 is not the best
clipboard provider, so if there are "local" providers available Nvim
should prefer those over OSC 52.

However, if no other providers are available, Nvim should use OSC 52
even when $SSH_TTY is not set. When a user is in an SSH session then the
checks for the other clipboard providers will still (typically) fail, so
OSC 52 continues to be enabled by default in SSH sessions.

This is marked as a breaking change because there are some cases where
OSC 52 wasn't enabled before and is now (or vice versa).

closes: vim/vim#16266

https://github.com/vim/vim/commit/c673b805ad80d0aef07e745d412a2bf298ba1c07

Co-authored-by: shane.xb.qian <shane.qian@foxmail.com>

closes: vim/vim#16248

https://github.com/vim/vim/commit/c363ca1ecd1f8db03663ef98dcf41eeacc3c22c7

Co-authored-by: Luca Saccarola <github.e41mv@aleeas.com>

fixes: vim/vim#16206

https://github.com/vim/vim/commit/5c42c7731536418c53273932d7ef76b80b001f38

Co-authored-by: Christian Brabandt <cb@256bit.org>

closes: vim/vim#16192

https://github.com/vim/vim/commit/b66cac1a8ed8636a38e867226f5bb621c96ff322

Co-authored-by: Luca Saccarola <github.e41mv@aleeas.com>

fixes: vim/vim#16185

https://github.com/vim/vim/commit/92b36663f8d0e507f60f357c6add6f6c9148a951

Co-authored-by: Christian Brabandt <cb@256bit.org>

On Debian 12 when detaching the program wouldn't launch at all

closes: vim/vim#16168

https://github.com/vim/vim/commit/eda923e9c9e639bc4f02b8b3ead1e7d27981e552

Co-authored-by: Konfekt <Konfekt@users.noreply.github.com>