bugfix: Add CLI option to override subscription plan

[realazizk]

• Add --plan/-p option to specify subscription plan (free, standard, max, premium)
• Pass plan override from CLI to analytics dashboard
• Override detected plan when --plan is provided
• Fix incorrect "Max Plan (5x)" label for premium plan (should be "Max Plan (20x)")
• Update prompts to show correct plan names and limits
• Display selected plan in success message

This allows users to manually specify their subscription plan instead of relying on auto-detection from conversation files.

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[realazizk]

@davila7 not sure why but i have the same issue as #7 this adds a cli override