[CLEANUP] Update workflows and environment

[eleanorfrajka]

Description:

Updated workflows to use micromamba (with environment.yml) instead of pip (with requirements-dev.txt).

Added environment.yml for conda usage.

Checklist:

• I have followed the coding conventions.
• I have updated or added tests to cover my changes.
• I have updated the documentation if needed.
• I have run pytest to check that all tests pass.
• I have run pre-commit run --all-files to lint and format the code.

[Copilot]

Pull Request Overview

This is a cleanup PR that modernizes the development environment by replacing pip-based dependency management with micromamba/conda workflows. The changes focus on updating GitHub Actions workflows and configuration files while also applying code formatting improvements.

• Updated GitHub Actions workflows to use micromamba with environment.yml
• Added conda environment configuration file
• Applied code formatting with Black (quote standardization and line wrapping)

Reviewed Changes

Copilot reviewed 12 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
seagliderOG1/writers.py	Code formatting: changed quotes and wrapped long log message
seagliderOG1/tools.py	Code formatting: standardized quotes, wrapped long lines, removed blank lines
seagliderOG1/convertOG1.py	Code formatting: standardized quotes, wrapped long lines, removed unused imports
requirements-dev.txt	Restructured to reference base requirements.txt and simplified version constraints
environment.yml	New conda environment configuration file
docs/source/conventions.md	New comprehensive coding conventions documentation
README.md	Enhanced with installation instructions, usage examples, and project structure
.github/workflows/tests.yml	Updated to use micromamba with environment.yml instead of pip
.github/workflows/docs_deploy.yml	Updated workflow to use micromamba environment
.github/workflows/docs.yml	Updated workflow to use micromamba environment
.github/PULL_REQUEST_TEMPLATE.md	Fixed broken link to coding conventions
.claude/settings.local.json	New Claude AI configuration file

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