Update mailpit label for supabase status in terminal and other reference to inbucket

[raucheacho]

What kind of change does this PR introduce?

default config toml change:
Update status output to use Mailpit

What is the current behavior?

The cli status still references Inbucket as the default local email testing server.

What is the new behavior?

• The status output inbucket url is updated from inbucket to mailpit to reflect the switch to Mailpit.
• All references to Inbucket in descriptions or code are replaced with Mailpit.

Additional context

Supabase has recently migrated from Inbucket to Mailpit as the default local email testing service. Updating the config.toml file helps keep the developer documentation consistent and avoids confusion during local setup.

[coveralls]

Pull Request Test Coverage Report for Build 15239106693

Details

• 22 of 26 (84.62%) changed or added relevant lines in 5 files are covered.
• 9 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.02%) to 60.201%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/status/status.go	2	3	66.67%
pkg/config/config.go	4	5	80.0%
internal/start/start.go	13	15	86.67%

Files with Coverage Reduction	New Missed Lines	%
internal/status/status.go	1	75.84%
pkg/config/config.go	1	59.79%
internal/start/start.go	2	65.06%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 15213051996:	-0.02%
Covered Lines:	9026
Relevant Lines:	14993

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💛 - Coveralls