Modernize repo

[wtgee]

• Move build settings over to pyproject.toml.
• Remove unused files.
• Remove ImagePathInfo (there is one in panoptes-utils.
• Move the ImageStatus and ObservationStatus enums into the settings file.
• Update docs

Closes #8

[Copilot]

Pull Request Overview

This PR modernizes the project's build and configuration infrastructure by migrating from setuptools to hatchling, consolidating settings, and updating documentation.

Key changes:

• Migrated build configuration from setup.py/setup.cfg to pyproject.toml using hatchling
• Consolidated enums (ImageStatus, ObservationStatus) into settings.py and removed ImagePathInfo class
• Updated documentation build process and added comprehensive build instructions

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Replaced setuptools configuration with hatchling build backend and consolidated all project metadata
setup.py	Removed legacy setuptools entry point
setup.cfg	Removed legacy configuration file
tox.ini	Removed tox configuration
environment.yaml	Removed conda environment file
.isort.cfg	Removed isort configuration (likely moved to pyproject.toml or replaced by ruff)
src/panoptes/data/settings.py	Added ImageStatus and ObservationStatus enums, removed PATH_MATCHER regex
src/panoptes/data/images.py	Removed entire file containing ImagePathInfo and ImageStatus classes
src/panoptes/data/observations.py	Removed ObservationStatus enum (moved to settings.py) and reordered imports
src/panoptes/data/search.py	Reordered imports, removed unused astropy import, simplified f-string formatting
src/panoptes/data/utils/cli/main.py	Updated type hints to use modern Python 3.12 syntax, removed unused exception variable
tests/conftest.py	Removed placeholder test configuration file
tests/test_skeleton.py	Removed skeleton test file
docs/conf.py	Updated copyright year, reordered imports, added autodoc_mock_imports, modernized f-string
docs/index.md	Added user documentation table of contents
docs/readme.md	Added comprehensive documentation build instructions
docs/requirements-full.txt	Added full documentation requirements file
.readthedocs.yaml	Updated to use requirements-full.txt for documentation builds
.github/workflows/docs.yml	Added new GitHub Actions workflow for building and deploying documentation
README.md	Reformatted code examples from doctest style to plain Python

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[Copilot]

Pull Request Overview

Copilot reviewed 23 out of 23 changed files in this pull request and generated 2 comments.

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