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## Summary: In this commit, I add a bunch more documentation of how to use genqlient, including a getting started guide, and a FAQ that also acts as a how-to shaped index of common configuration options and extension points. Much of this is adapted from the internal doc I wrote at Khan, or reorganized from what was in the README. Speaking of which, now that there are better places for all the details, I rewrote the README to be a bit more of an overview and index of other documentation. (For now I left the "unmaintained" notes, which I'll remove fairly soon once all our ducks are in a row.) Fixes #26, #39. Issue: https://github.com/Khan/genqlient/issues/26 Issue: https://github.com/Khan/genqlient/issues/39 ## Test plan: make check, read the docs Author: benjaminjkraft Reviewers: mahtabsabet, benjaminjkraft, aberkan, dnerdy, jvoll, MiguelCastillo Required Reviewers: Approved By: mahtabsabet Checks: ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Lint, ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Lint Pull Request URL: https://github.com/Khan/genqlient/pull/86