docs(cli): document missing CLI commands in README

[alelpoan]

Problem

cli/README.md documents 9 of the 16 commands registered in main.rs.
The following 7 commands are fully implemented and callable but have no
documentation:

• claim-rent
• display-proposals
• display-vault
• initiate-transfer
• initiate-batch-transfer
• initiate-program-upgrade
• program-config-init

Root Cause

main.rs registers 16 subcommands. README covers 9. The gap grew as new
commands were added without corresponding documentation updates.

Fix

cli/README.md

1. Added 7 missing command sections

Each section follows the existing format (Description → Syntax → Parameters
→ Example Usage). Parameters extracted directly from #[derive(Args)]
structs in the corresponding .rs files.

2. Updated Table of Contents

Added anchor links for all 7 new sections.

Verification

• All parameters verified against source .rs files in cli/src/command/
• Command names verified against match arms in cli/src/main.rs
• transfer_common.rs excluded — internal helper module, not a subcommand
• No code changes — documentation only

[vercel]

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