rename: aldabra → aldabra (per Sulkta 2026-05-04)

Aldabra giant tortoise (Aldabrachelys gigantea) — endemic to the
Aldabra atoll, up to 250 kg, 150-year lifespan. Long-lived,
defended, slow but unstoppable. Better metaphor for the wallet
than 'aldabra' which was on-the-tin descriptive.

All renames in one pass:
- repo: Sulkta-Coop/aldabra → Sulkta-Coop/aldabra (via gitea API)
- workspace dir: aldabra → aldabra
- crate dirs: wallet-{core,chain,mcp} → aldabra-{core,chain,mcp}
- crate names + path imports in Cargo.toml workspace + each crate
- binary name: aldabra → aldabra
- README, ROADMAP, docs/architecture: all references swept

crates/wallet-core/Cargo.toml

@@ -1,35 +0,0 @@
-# wallet-core — pure crypto + types. No I/O, no network. Deterministic
-# given the same mnemonic + derivation path.
-#
-# This crate is intentionally narrow:
-#   - Mnemonic → root key
-#   - Root key → payment / stake key (CIP-1852 derivation)
-#   - Address construction (mainnet, testnet)
-#   - Transaction signing (given an unsigned TX builder output from
-#     wallet-chain or pallas-txbuilder)
-#
-# It deliberately does NOT:
-#   - Do any chain queries (that's wallet-chain's job)
-#   - Talk to MCP (that's wallet-mcp's job)
-#   - Touch files (the daemon owns disk I/O; we get keys handed in)
-#
-# Rationale: this is the most security-sensitive crate. Keeping it
-# narrow + I/O-free makes it auditable.
-
-[package]
-name = "wallet-core"
-version.workspace = true
-edition.workspace = true
-license-file.workspace = true
-repository.workspace = true
-authors.workspace = true
-
-[dependencies]
-pallas-primitives = { workspace = true }
-pallas-codec = { workspace = true }
-pallas-crypto = { workspace = true }
-pallas-addresses = { workspace = true }
-bip39 = { workspace = true }
-zeroize = { workspace = true }
-thiserror = { workspace = true }
-serde = { workspace = true }