granted: fix missing assume binary

[emmanuj]

Granted requires both granted and assume to function. This PR fixes the missing assume command.

What this PR does

• Adds assumego symlink pointing to the granted binary
• Installs assume shell script from source (scripts/assume)
• Installs assume.fish shell script from source (scripts/assume.fish)

Why this is needed

Granted runs as two components:

1. granted - the Go binary (built from source)
2. assume - a shell script wrapper that calls assumego and exports AWS credentials to the parent shell

Without assume, users get "command not found: assume" making the tool non-functional.

Testing

brew uninstall granted --force
HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source granted

Verified all binaries installed:

$ which granted && which assume && which assumego
/opt/homebrew/bin/granted
/opt/homebrew/bin/assume
/opt/homebrew/bin/assumego

$ granted --version
Granted version: 0.38.0

Assume command works:

$ assume poc
[✔] [poc](us-west-2) session credentials will expire in 12 hours

Tests pass:

$ brew test granted
==> Testing granted
==> /opt/homebrew/Cellar/granted/0.38.0/bin/granted --version
==> /opt/homebrew/Cellar/granted/0.38.0/bin/granted auth configure 2>&1

Style check:

$ brew style granted.rb
1 file inspected, no offenses detected

Closes #249904

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[p-linnane]

Thanks!

[github-actions]

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[SMillerDev]

Thanks @emmanuj ! Without contributions like yours it'd be impossible to keep homebrew going with the high standards that users have come to expect from the project. You can feel good knowing that you've made the world a tiny bit better for homebrew users around the world! 👍 🎉