update: migrate quasar programs to latest API

[jim4067]

Note

Medium Risk
Medium risk due to broad, cross-cutting API migration across many on-chain examples (account context types, PDA seeds, and CPI call signatures), which could break compilation or subtly change account validation if mismatched.

Overview
Updates all Quasar examples to depend on upstream quasar-lang (and quasar-spl where used) from Git, and refactors instruction #[derive(Accounts)] contexts to the new owned account types (dropping 'info lifetimes) with handlers now consistently taking &mut accounts.

Adds #[seeds(...)] annotations to state structs and updates PDA constraints to use generated Type::seeds(...)/*_seeds(...) helpers (plus set_inner where required), while adjusting CPI helpers to pass account references and updating a few small utilities (e.g., name matchers) to match new APIs. Also ignores .claude in .gitignore.

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[mikemaccana]

Awesome work and thanks - just remove the impl and let the instruction handlers and account constraints be seperate and we can get this in!

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