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

pezkuwi/node/core/candidate-validation/src/lib.rs

@@ -530,7 +530,7 @@ where
 		.iter()
 		.any(|v| keystore.has_keys(&[(v.to_raw_vec(), AuthorityDiscoveryId::ID)]));
 
-	// We could've checked discovery_keys but on Kusama validators.len() < discovery_keys.len().
+	// We could've checked discovery_keys but on Dicle validators.len() < discovery_keys.len().
 	let is_present_validator = session_info
 		.validators
 		.iter()