Merge vetted upstream imports

[xxxbrian]

Summary

• merge the reviewed upstream import stack from integration/upstream-prs into main
• includes imported upstream PRs Make directory completions respect fifc_fd_opts gazorby/fifc#52, Use eza instead of exa gazorby/fifc#54, Fix escaping fzf query gazorby/fifc#60, and fix: remove extra tab binding gazorby/fifc#61
• intentionally excludes the separate rewrite of upstream PR Allow override of rm and custom fzf options gazorby/fifc#49

Included PRs

• Import upstream PR #52: respect fifc_fd_opts for directories #1 Import upstream PR Make directory completions respect fifc_fd_opts gazorby/fifc#52: respect fifc_fd_opts for directories
• Import upstream PR #54: use eza fallback chain #2 Import upstream PR Use eza instead of exa gazorby/fifc#54: use eza fallback chain
• Import upstream PR #61: remove extra tab binding #3 Import upstream PR fix: remove extra tab binding gazorby/fifc#61: remove extra tab binding
• Import upstream PR #60: fix fzf query escaping #4 Import upstream PR Fix escaping fzf query gazorby/fifc#60: fix fzf query escaping

Deferred

• Rewrite upstream PR #49: safe configurable fzf overrides #5 Rewrite upstream PR Allow override of rm and custom fzf options gazorby/fifc#49: safe configurable fzf overrides