Update CHANGELOG.md with new version dates and enhance documentation …

…clarity

- Updated version date for 0.1.2 to 2025-11-04 in CHANGELOG.md.
- Updated version date for 0.1.0 to 2025-11-03 in CHANGELOG.md.
- Improved clarity of documentation reference in running-experiments.md by changing the phrasing for CLI Runner Configuration.

Update FluxLoop VSCode Extension to version 0.1.2 and enhance CHANGELOG

- Bumped version in package.json from 0.1.1 to 0.1.2.
- Updated CHANGELOG.md to reflect the new version and provide a link to the release.

Bump FluxLoop CLI and SDK versions, enhance configuration handling

- Updated CLI version from 0.2.3 to 0.2.11 in `pyproject.toml` and `__init__.py`.
- Updated SDK version from 0.1.0 to 0.1.2 in `pyproject.toml` and `__init__.py`.
- Introduced `_AttrDict` class in `arg_binder.py` for improved dictionary attribute access.
- Added `_normalize_runner_target` function in `config_loader.py` to populate runner configuration from target strings.
- Enhanced `ExperimentRunner` with environment variable loading from `.env` files and improved error handling.
- Updated `RunnerConfig` to support a list for `python_path` and added coercion logic.
- Expanded documentation to include new runner target configurations and recording commands.