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Correctly handle empty query strings

Done for three reasons, in order of importance:

1. Use a language without a runtime to hopefully stop being incorrectly flagged as malware by anti-viruses
2. I was informed there are even faster tools
3. Have fun rewriting in Zig

scoop-search should behave exactly as before, but is now even faster.

• Support scoop config directory (@v1nh1shungry #30)

• Allow for bin alias syntax without an alias
• Bump Go version
• Ignore non-dirs in buckets path