fix: update stale links, fix code bugs, and rebrand Hyle to Hyli

[giwaov]

Summary

This PR fixes stale references from the Hyle -> Hyli rebrand, corrects actual code bugs, and fixes typos across all example contracts.

Stale links & references (21 files)

• Updated all docs.hyle.eu links to docs.hyli.org (7 occurrences across READMEs)
• Updated all hyle-org/hyle git dependency URLs to hyli-org/hyli (8 Cargo.toml files)
• Updated Hyle-org GitHub org references to hyli-org (3 README links)
• Fixed broken simple_erc20 branch references to main (2 links)
• Rebranded "Hyle"/"Hylé" to "Hyli" in all READMEs

Code bugs fixed

• simple-identity: Ok("Successfully registered identity for account: {}".to_string()) used a literal {} instead of format!() — the account name was never interpolated
• ticket-app: Error message for insufficient transfer amount showed self.ticket_price.0 (token name) and &recipient (address) instead of the expected price (self.ticket_price.1) and actual amount
• simple-token: Stale error message referenced "hyllar state" instead of "SimpleToken state"

Typos & copy-paste fixes

• contrat → contract (simple-identity)
• Weither → Whether (check-secret-noir)
• Amm contract → TicketApp contract (ticket-app comment)
• Simple Token Contract implementation in Noir → Check Secret Contract implementation in Noir (check-secret-noir)

Test plan

• Verify all updated links resolve correctly
• Verify Cargo.toml git dependencies still resolve with the new URLs
• Verify the format string fix in simple-identity produces the expected output
• Verify the ticket-app error message now shows the correct price and amount values