chore: add completions for nushell and fig with clap #319

Job	Run time
Wait for CI Workflow	4s
Cargo publish taplo-cli	17s
get_version	4s
Cargo publish taplo	16s
Cargo publish taplo-lsp	10s
Cargo publish lsp-async-stub	15s
Build python wheels (ubuntu, x86)	5m 42s
aarch64-apple-darwin	3m 48s
x86_64-pc-windows-msvc	5m 36s
x86_64-apple-darwin	3m 39s
aarch64-pc-windows-msvc	5m 53s
NPM publish @taplo/lsp	27s
NPM publish @taplo/core	21s
Build python wheels (ubuntu, aarch64)	4m 6s
Cargo publish taplo-common	13s
Build python wheels (macos, x64)	2m 38s
i686-pc-windows-msvc	5m 7s
Build python wheels (windows, x64)	5m 56s
Build python wheels (ubuntu, x64)	3m 57s
NPM publish @taplo/lib	23s
NPM publish @taplo/cli	27s
Build python wheels (windows, x86)	7m 13s
Build python wheels (macos, aarch64)	2m 53s
Publish VSCode Extension	1m 1s
Build linux executables	23m 0s
Test python wheels (windows-latest)	17s
Test python wheels (ubuntu-latest)	6s
Test python wheels (macos-latest)	12s
Release Taplo CLI binaries	5s
PyPI publish taplo	0s
	1h 24m 6s

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