Add supabase studio command

[jsj]

What kind of change does this PR introduce?

Feature - Adds a new CLI command supabase studio to open Supabase Studio directly from the terminal

What is the current behavior?

Currently, users need to manually open their browser and navigate to the Supabase Studio dashboard.

What is the new behavior?

This PR adds a new studio command that automatically opens the Supabase Studio dashboard in the user's default browser. The command:

• Works cross-platform (macOS, Windows, and Linux)
• Uses the appropriate system command to open the browser (open for macOS, start for Windows, xdg-open for Linux)
• Provides feedback to the user by displaying the URL being opened
• Handles errors gracefully with descriptive error messages

Example usage:

supabase studio

[coveralls]

Pull Request Test Coverage Report for Build 12164787997

Details

• 3 of 19 (15.79%) changed or added relevant lines in 1 file are covered.
• 7 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.1%) to 59.485%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cmd/studio.go	3	19	15.79%

Files with Coverage Reduction	New Missed Lines	%
internal/storage/rm/rm.go	2	89.53%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 12155003566:	-0.1%
Covered Lines:	6394
Relevant Lines:	10749

---

💛 - Coveralls