Rewrite Haxe Manager in Haxe, multi platform

[kLabz]

• Port hx to eval (with hxb for better perf)
• Linux64, mac, windows64 support
• hx --help help message
• hx: fzf-like picker reimplemented for eval - https://asciinema.org/a/AV1vmYJ8gZoj8aW4YaxzC8h6S
• 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
• Remove hx-select in favor of (already existing) hx download
• Remove hx-select in favor of (already existing) hx select
• hx list-modules as port of previous extra/hxfzf
• hx list as port of previous extra/list
• hx install as port of previous hx download [local archive]
• hx current as port of previous extra/current (+ added hx current --name and hx current --full for unix)
• Include and credit ansi and fuzzaldrin libs
• Fzf: Rework fuzzy search (adjust sort, highlight)

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

Closes #6