Improve CLI visual design

[andreapollastri]

Summary

Makes cipi-cli more visually polished in the terminal without changing command behavior or JSON output.

• Banner & welcome screen — boxed ASCII logo and quick-start hints when running cipi-cli with no arguments
• Tables — bordered layout with alternating row shading and correct column alignment (ANSI-aware)
• Status badges — active / suspended, yes / no, and job status values are color-coded
• Key-value output — dot-aligned fields for show, version, and profile views
• Spinner — clearer async job progress line with job ID

Visual changes

Area	Before	After
Default run	Plain banner + one-line hint	Boxed banner + quick-start examples
Tables	Plain columns with dim separators	Box-drawn borders + zebra rows
Status fields	Raw yes/no text	Colored active / suspended badges
Detail views	Left-aligned key-value pairs	Dot-aligned key-value pairs

--json and --no-color modes are unchanged.

Test plan

• go build succeeds
• go vet ./... passes
• Manual check: cipi-cli (welcome screen), cipi-cli version
• Manual check with a configured profile: apps list, domains, jobs show