feat: add command auto-completion support to TextInput

[jainiksha]

Closes #1697

Changes made

• Added command suggestion support to TextInput
• Added real-time suggestion filtering
• Added Tab key auto-completion
• Added suggestion display below input
• Added case-insensitive matching

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: a37ab469-d4d7-441f-82bc-e41a296f57c1

📥 Commits

Reviewing files that changed from the base of the PR and between 3c064c4 and 14a4994.

📒 Files selected for processing (1)

• packages/widgets/src/input/TextInput.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[jainiksha]

@Karanjot786 resolved