Add support for custom pagers, e.g. Delta#1593

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stevenxxiu wants to merge 11 commits intoNeogitOrg:masterfrom

stevenxxiu:feat/custom-pager

Commits on May 22, 2025

feat: support viewing the diff via other pagers, e.g. *Delta*
stevenxxiu
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refactor: ANSI colorize continuous chunks at once
stevenxxiu
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docs: add *Delta* example for `log_pager`
stevenxxiu
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docs: for *Delta*, hyperlinks must be disabled in its *Git* config section
stevenxxiu
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refactor: use `vim.system()` instead of *plenary* to run `config.values.log_pager`
stevenxxiu
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refactor: run the pager in `neogit.lib.git.diff` `build_pager_contents()`
stevenxxiu
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refactor: move `Buffer:set_line_highlights()` ANSI highlights to `Buffer:set_ansi_highlights()`, to avoid finding hunk line numbers manually with the hard-coded `NeogitDiffContext`
stevenxxiu
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feat: handle "Erase in Line"
stevenxxiu
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docs: switch from `*` to ` `` `, as help documents treat that as a tag
stevenxxiu
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test: add `pager_contents` to `subject.parse()` specs
stevenxxiu
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fix: match from the start of the line when building hunks, or `.diff` files will be shown incorrectly
stevenxxiu
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