rebrand: kusama → dicle

- Replace all kusama/Kusama references with dicle/Dicle
- Rename weight files from ksm_size to dcl_size
- Update papi-tests files from ksm to dcl
- Remove chain-specs/kusama.json files
- cargo check --workspace successful (Finished output)
- Update MAINNET_ROADMAP.md: FAZ 8 completed

Cargo.lock

@@ -21412,6 +21412,7 @@ dependencies = [
  "pezframe-benchmarking-cli",
  "pezframe-remote-externalities",
  "pezframe-support-procedural-tools",
+ "pezkuwi-sdk",
  "pezkuwi-subxt-signer",
  "pezmmr-gadget",
  "pezmmr-rpc",