Haxe rewrite

[kLabz]

rewrite/haxe branch

Handled:

• Port hx to eval (with hxb for better perf)
• Linux64, mac, windows64 support with basic CI
• hx --help help message
• hx: fzf-like picker reimplemented for eval
• hx download: Add support for short hash nightlies
• hx download: Nice automatic alias when not provided (haxe version string)
• hx download VERSION: Detect semver-looking versions before trying to download release
• Port extra/current as hx current (+ added hx current --name and hx current --full for unix)
• Port extra/list as hx list
• Fzf: Ctrl+W support (delete from cursor to beginning of word)
• Fzf: Handle scroll + scroll indicator
• Fzf: Rework fuzzy search (adjust sort, highlight)
• Properly credit ansi and fuzzaldrin libs
• hx list-modules as port of previous hxfzf (extra)
• hx install as port of previous hx download [local archive]

Later:

• [CI] Generate releases #7
• Linux arm64 support #8
• [hx download] Allow overwriting already downloaded versions #9
• Detect support for fancy colors, fallback to basic ones #10
• Backport changes to ansi and fuzzaldrin libs? #11