chore(pblock-list): move program into pinocchio/ subdirectory

The Block List example is a Pinocchio implementation, but it lived directly
under pblock-list/ rather than under a pinocchio/ subdirectory. This is
inconsistent with the rest of the repo, where every other Pinocchio-only
example is named pinocchio/ (13 sibling directories follow this pattern,
including basics/counter/pinocchio/, basics/hello-solana/pinocchio/, etc.).

Move program/, sdk/, cli/, Cargo.toml, codama.ts, package.json, tsconfig.json,
and .gitignore into a new pinocchio/ subdirectory. The parent readme.md
stays at the top of pblock-list/ and is updated to point at the new paths
(and to instruct users to cd into pinocchio/ before running pnpm install
and cargo build commands).

All 52 files are tracked as renames (R100) — no content changed.

Internal paths in the moved files are unaffected: Cargo.toml workspace
members (program, cli, sdk/rust) and the codama.ts renderer paths
(sdk/ts/src, sdk/rust/...) are all relative to the file/CWD, so they
continue to resolve correctly from the new pinocchio/ location.

Side effect: the pinocchio.yml CI workflow filters changes on
'**/pinocchio/**', so this move enables CI on this example for the first
time.

Follows up on #18, which removed the byte-for-byte duplicate at
pblock-list/pino/.

Author: rocketiotemp