pip not available to plugins

[George Boot]

First of all: amazing work here!

I am trying to open a plugin that tries to install a package via pip (websockets).

It fails and results in the following error message:

Traceback (most recent call last):
              File "/Users/george/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/orbit3dmapping/orbit_3dmapping.py", line 262, in doOpenPlugin
              process = subprocess.Popen(["pip","install","websockets"], cwd=pluginDir)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              File "/Applications/QGIS.app/Contents/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 1022, in __init__
              self._execute_child(args, executable, preexec_fn, close_fds,
              File "/Applications/QGIS.app/Contents/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 1899, in _execute_child
              raise child_exception_type(errno_num, err_msg, err_filename)
             FileNotFoundError: [Errno 2] No such file or directory: 'pip'

[dgb]

Oops. QGIS stores Python packages in Resources outside the Python framework, and I bundled all the packages in Resources for uniformity and didn't realize this might be problematic. Python also falls back to my local installation so the problem doesn't show up for me.

I repackaged a 3.28.1_1 which should fix this. After a bit of testing, sometimes pip can't use TLS but python apparently can. I'll figure this out for the next point release.