chore: prettify, sort, and round out .gitignore

Reorganizes .gitignore into labeled sections (Python cache, venvs, build
artifacts, IDE, OS, logs, env files, generated output, project scratch,
Conductor) with sorted entries within each group and trailing slashes on
directory patterns for clarity.

Folds in three smaller intents that would otherwise be separate commits:
- Add .context/ for Conductor workspaces (collaboration scratch)
- Add coverage.xml + .pytest_cache/ to fully cover pytest-cov outputs
  (.coverage.* and htmlcov/ were already on main from prior work)
- Add *.swp / *.swo for vim swap files

Drops the stale `*.cpython-312.pyc\`` line with a literal-backtick typo;
it wasn't matching anything and `*.pyc` already covers the case.

No behavior changes anyone would notice from the resulting rule set.

Signed-off-by: lelia <2418071+lelia@users.noreply.github.com>

Author: lelia

.gitignore

@@ -1,34 +1,58 @@
-.idea
-venv
-.venv
-.venv-test
-build
-dist
+# --- Python bytecode / cache ---
+*.pyc
+__pycache__/
+.coverage
+.coverage.*
+coverage.xml
+htmlcov/
+.pytest_cache/
+
+# --- Virtual environments ---
+venv/
+.venv/
+.venv-test/
+Pipfile
+
+# --- Build / packaging ---
 *.build
 *.dist
-*.egg-info
-*.env
-run_container.sh
+*.egg-info/
+bin/
+build/
+dist/
 *.zip
-bin
-scripts/*.py
+
+# --- Editor / IDE ---
+.idea/
+*.swp
+*.swo
+
+# --- OS ---
+.DS_Store
+
+# --- Logs ---
+logs/
+
+# --- Env files ---
+*.env
+.env.local
+
+# --- Generated output ---
 *.json
-*.sarif
 !tests/**/*.json
 !examples/config/*.json
+*.sarif
 markdown_overview_temp.md
 markdown_security_temp.md
-.DS_Store
-*.pyc
-test.py
-*.cpython-312.pyc`
+
+# --- Project-specific scratch ---
+ai_testing/
 file_generator.py
-.coverage
-.coverage.*
-htmlcov/
-.env.local
-Pipfile
+run_container.sh
+scripts/*.py
 test/
-logs
-ai_testing/
+test.py
 verify_find_files_lazy_loading.py
+
+# --- Conductor workspace ---
+.context/