[Docs](@clack/prompts): Add documentation for new prompts

[MacFJA]

• taskLog
• progress

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taskLog prompts

Added with this commit: bombshell-dev/clack@0aaee4c

Changeset comment:
Added new taskLog prompt for log output which is cleared on success

progress prompts

Added with this PR: bombshell-dev/clack#290

Changeset comment:
Adds new progress prompt to display a progess-bar