Otoole

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- Updates to citation file
- Relink to coveralls
- Upgrade to pandas 2.0
- Add issue and PR templates
- Add reading checks between config file and input data

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- Requires explicit provision of a user-defined configuration file for otoole to workbook
- Deprecates datapackage fuctionality
- Adds setup command to generate template config.yaml and csv files
- Documentation update
- Bumped pyscaffold to 4.2
- Otoole now requires Python 3.8 or later

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- Foundation for user defined configuration
- Fix for issue 101
- Better writing of floating point numbers as text

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- Adds support for OSeMOSYS v1.0, Gurobi and CBC

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- Adds support for processing Gurobi solution files
- Better handling of datatypes when converting datapackages
- Fixing bugs on Windows where empty lines were written out during conversion to datapackage

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- Behind-the-scenes reorganisation of code to use `ReadStrategies` and `WriteStrategies`
pattern. This enables much cleaner structuring of the code and more reusability of
modular blocks.
- Updates to documentation with clearer explaination of how to perform conversions
- Otoole now requires Python 3.7 or later
- Harmonisation of results and pre-processing using the strategies mentioned above
- Bugfixes for 61, 63, 65, 70