chore: tweak server start output

[sapphi-red]

Description

ⓘ has a different width with ➜ depending on fonts. This PR replaces that letter and tweaks some messages.

@patak-dev You suggested ➜ (U+279C) but how about ❖ (U+2756)? It has the same width (East Asian Width, East Asian Width data).

letter	width
ⓘ (U+24BE)	East Asian Ambiguous (A)
➜ (U+279C)	Neutral (N)
❖ (U+2756)	Neutral (N)

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[patak-dev]

The ❖ looks ok. Here are some screenshot of my terminal with it:

The blue color seems a bit off when used together with the other ones. Maybe using no color here (the last white one) is better?

[sapphi-red]

White one was ok for my terminal too. 👍