… improve code quality

Refactoring and Logic Improvements

- Refactored the `_scan_directory` function in `src/gitingest/ingest_from_query.py` by extracting loop logic into the new `_process_item` function, and further separating functionality into `_process_symlink` and `_process_file`
- Replaced multiple return statements with error raising and catching, introducing custom exceptions (`MaxFilesReachedError`, `MaxFileSizeReachedError`, `AlreadyVisitedError`) in the `_process_item` and `_scan_directory` functions
- Enhanced the logic in the `process_query` function in `src/process_query.py` for better flow and maintainability
- Improved the logic in `_generate_token_string` in `src/gitingest/ingest_from_query.py`
- Refined the `download_ingest` function in `src/routers/download.py` for better clarity and functionality

Exception Handling Enhancements

- Replaced broad `Exception` handling with specific `OSError` in the `_read_file_content` function in `src/gitingest/ingest_from_query.py`
- Refined exception handling throughout the codebase, including removing redundant try-except-raise blocks, e.g., in `clone_repo` function in `src/gitingest/clone.py`
- Added custom exceptions to `src/gitingest/exceptions.py`: `MaxFilesReachedError`, `MaxFileSizeReachedError`, and `AlreadyVisitedError`
- Included explicit re-raising of exceptions in various functions for improved error propagation

Test Suite Refactoring

- Cleaned up and reorganized test files:
  - Moved tests from `src/gitingest/tests/` to `tests/`
  - Consolidated fixtures from `tests/test_ingest.py` into `tests/conftest.py`
  - Removed redundant content from `tests/conftest.py`
- Migrated configuration from `pytest.ini` to `pyproject.toml`, deleted `pytest.ini`, and updated `.dockerignore`

Documentation Improvements

- Added `darglint` for enforcing `numpy` docstring style in `.pre-commit-config.yaml` for `src/` files
- Updated docstrings throughout the codebase, including adding module docstrings where needed
- Updated `README.md`:
  - Added "GitHub stars" badge
  - Moved the "Discord" badge to its own line
  - Replaced occurrences of "Gitingest" with "GitIngest" for consistency and clarity

Linting and Code Quality

- Integrated `pylint` into `.pre-commit-config.yaml` for both `src/` and `tests/` directories
- Created `tests/.pylintrc` for linting configuration specific to test files

Code Clean-up

- Removed the redundant `src/__init__.py` file

Naming Conventions and Code Style

- Renamed `logSliderToSize` to `log_slider_to_size` in `src/server_utils.py` for consistency with Python's naming conventions
- Added explicit encoding specification in multiple instances of `open` throughout the code