feat(ts): add Bun test template

[a-hariti]

Adds a --test-template bun option to anchor init

The package manager is replace by bun when the test template is set to bun.

Note

I had to prepend a sleep 0.3 to bun test in Anchor.toml, otherwise anchor test fails with an error that the program is not deployed.

The minimum time required looks suspiciously close to a slot time.

This is obviously a race condition due to the speed of Bun, but I'm not sure about the ideal way to handle it.

[vercel]

@a-hariti is attempting to deploy a commit to the Solana Foundation Team on Vercel.

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