🐛 v3.4.2 Fix remove executor truncation, webterm bugs.

[bmeares]

v3.4.2

• Run inline Python with mrsm python -c.
  The python action now accepts Python's own -c CODE idiom (e.g. mrsm python -c "print(mrsm.__version__)"), executing the code with meerschaum already imported and then exiting. Globally -c means --connector-keys, so this rewrite is scoped to the python action only; every other action's -c is unchanged. The previous forms (mrsm python "code" --noask and the bracketed mrsm python [-c "code"]) still work.

• Fix truncated output for actions run on a remote api: executor.
  Running a long-output action (e.g. show pipes) on an api: executor only showed the last 30 lines — the beginning was silently dropped. The remote job's log monitor defaults to emitting only the last lines_to_show (30) lines, which is the right behavior when attaching to a long-running job but wrong for a one-shot action whose entire output matters. Temporary action jobs created by APIConnector.do_action_async now set logs.lines_to_show = 0 (emit everything), mirroring the local CLI worker.

• Add a Users page to the web console.
  A new /dash/users page lists the instance's registered users (paginated and searchable, mirroring the Plugins page), with a shareable per-user detail page at /dash/users/<username> that lists the plugins they've published. A plugin card's author now links to its owner's user page. A user's type (admin vs. normal) is intentionally never exposed.

• Format show data output as a table.
  mrsm show data now renders each pipe's DataFrame as a Markdown table (the same pprint_df() formatter used by mrsm sql) instead of the raw Pandas repr. The --nopretty JSON output is unchanged.

• Add a plugins update checker.
  Plugins installed from a repository now record their origin (e.g. api:mrsm) in a per-directory .mrsm_origins.json manifest that travels with the plugins directory (so it survives being mounted into another environment). On shell launch a background thread caches the latest versions from each plugin's origin repo, and the interactive prompt prints a banner listing any plugins that have fallen behind, suggesting upgrade plugins. Locally-authored plugins (no recorded origin) are skipped. Reuses the existing shell:updates config (check_remote, refresh_minutes).

• Silence the starlette.middleware.wsgi deprecation warning during start api.
  The Dash app is now mounted with a2wsgi's WSGIMiddleware instead of the deprecated fastapi.middleware.wsgi.WSGIMiddleware.