Replace `haskell-src-exts` with `ghc-lib-parser`

[toku-sa-n]

See #587 for the background.

TODOs

• [x] Pass all tests on GHC version 9.2.2
• [ ] Pass all tests on every GHC version tested on CI (Difficult because of the drastic changes of ghc-lib-parser)
• [ ] Resolve all TODOs and FIXMEs
• [ ] Remove all undefineds
• [ ] Refactor.
• [ ] Test with existing code, like the original Hindent's one or my source code
• [ ] Test with tab size other than 2
• [ ] Format with Hindent
• [ ] Remove all files that I committed for my development environment
• [ ] s/return/pure
• [ ] Remove src/SwitchToGhcLibParserHelper.hs
• [ ] Remove all warnings
• [ ] Run weeder
• [ ] Run hlint
• [ ] Export necessary things. During the rewiring, I removed some of them to make rewriting easier.

Problems

• We need to drop the support of GHC 8.2.2 because ghc-lib-parser cannot build with base < 4.11.

Fixes: #587