Add CLI Support for playFrames Animation

[pushkarscripts]

Description:

We want to add full CLI support for the flossum playFrames animation, allowing users to pass custom frames and options like --delay and --repeat.

Currently, playFrames isn't properly supported via CLI with arguments like:

flossum playFrames --frames "[= ]" "[==]" "[===]" --delay 100 --repeat 2

Expected behavior: the frames should animate in sequence, with the specified delay between them, and repeat the whole cycle as specified.

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Implementation Steps:

• Modify CLI (bin/flossum.js) to extract --frames, --delay, and --repeat using minimist
• Pass these as an options object to flossum.playFrames()
• Add input validation: ensure frames is an array, delay/repeat are numbers
• Update CLI --help output
• Update README examples with `playframes' usage

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Example Code Snippet:

case 'playFrames':
  await flossum.playFrames({
    frames: args.frames || ["⠋", "⠙", "⠚", "⠞"],
    delay: parseInt(args.delay) || 100,
    repeat: parseInt(args.repeat) || 2
  });
  break;