Refresh README visuals with real obfuscation terminal GIF and Medium preset output excerpt

[Copilot]

Improves the main README’s presentation while preserving existing content and structure. Adds a clearer visual entry point for new users by showing a real obfuscation run and a real output excerpt.

• README visual refresh

  • Added a new ## Preview section to the main README.
  • Embedded an animated asset: assets/readme/obfuscation-preview.gif.
  • Kept existing sections/content intact and in the same general order.

• Preview GIF updated to real CLI output

  • Regenerated assets/readme/obfuscation-preview.gif from an actual cli.lua obfuscation run.
  • The GIF now shows real terminal output during obfuscation, including colorized log styling.

• Obfuscation output preview

  • Replaced the handcrafted/simplified output sample with an excerpt from a real obfuscated file generated using the Medium preset.
  • Clarified in the README that the shown block is an excerpt and intentionally truncated.

-- input.lua
local secret = "Prometheus"
local answer = 42
print(secret .. " -> " .. answer)

-- generated with: lua ./cli.lua --preset Medium ./simple.lua
-- excerpt from ./simple.obfuscated.lua
return(function(...)local L={"afT6mf1V","/7mJXsuvmE1c/fT3"; ...}
... (remaining obfuscated output omitted)

• Copy polish

  • Minor wording/capitalization cleanup in existing README text (no semantic/content expansion).

• Assets

  • Updated assets/readme/obfuscation-preview.gif for in-README rendering.

https://github.com/user-attachments/assets/6e3e5d13-c789-4336-8dab-b346c3963449

Original prompt

Create a new branch. In this branch, improve the main Readme. Mainly focus on improving looks (Render nice preview of obfuscated code, gif of obfuscation process, etc.). Content should mostly stay the same, but you may improve wording.

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[levno-710]

Please make the gif show the actual terminal output while obfuscating a simple script. For the preview, please obfuscate a script using medium preset and show a part of that script

[Copilot]

Please make the gif show the actual terminal output while obfuscating a simple script. For the preview, please obfuscate a script using medium preset and show a part of that script

Done in commit 6800f06. The GIF now shows real terminal output from an actual lua ./cli.lua --preset Medium run on a simple script, and the README output preview now contains an excerpt from that real generated obfuscated file. Screenshot: https://github.com/user-attachments/assets/6e3e5d13-c789-4336-8dab-b346c3963449