Improvements to the documentation

This MR introduces a few miscellaneous improvements to the documentation, including some content restructuring and configuration updates.

changed milestone to %GWDataFind Client 2.0.0

added documentation label

assigned to @duncanmmacleod

added 3 commits

• d1c42178...36cf1edb - 2 commits from branch computing/gwdatafind:main
• 1eed8240 - Improvements to the documentation

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added 4 commits

• 1eed8240...9c161a55 - 3 commits from branch computing/gwdatafind:main
• 35bdb5b2 - Improvements to the documentation

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added 1 commit

• c947392d - ui: fix incorrect RequestException intersphinx ref

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added 1 commit

• 57f271bc - docs: remove redundant targets

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mentioned in commit 98048619

merged