feat: Rebrand Polkadot/Substrate references to PezkuwiChain

This commit systematically rebrands various references from Parity Technologies'
Polkadot/Substrate ecosystem to PezkuwiChain within the kurdistan-sdk.

Key changes include:
- Updated external repository URLs (zombienet-sdk, parity-db, parity-scale-codec, wasm-instrument) to point to pezkuwichain forks.
- Modified internal documentation and code comments to reflect PezkuwiChain naming and structure.
- Replaced direct references to  with  or specific paths within the  for XCM, Pezkuwi, and other modules.
- Cleaned up deprecated  issue and PR references in various  and  files, particularly in  and  modules.
- Adjusted image and logo URLs in documentation to point to PezkuwiChain assets.
- Removed or rephrased comments related to external Polkadot/Substrate PRs and issues.

This is a significant step towards fully customizing the SDK for the PezkuwiChain ecosystem.

pezkuwi/node/subsystem-bench/grafana/availability-read.json

@@ -260,7 +260,7 @@
             "uid": "$data_source"
           },
           "editorMode": "code",
-          "expr": "sum(rate(substrate_tasks_polling_duration_sum{}[2s])) by ($cpu_group_by)",
+          "expr": "sum(rate(bizinikiwi_tasks_polling_duration_sum{}[2s])) by ($cpu_group_by)",
           "interval": "",
           "legendFormat": "{{task_group}}",
           "range": true,
@@ -363,7 +363,7 @@
             "uid": "$data_source"
           },
           "editorMode": "code",
-          "expr": "increase(substrate_tasks_polling_duration_sum{task_group=\"availability-recovery\"}[6s])",
+          "expr": "increase(bizinikiwi_tasks_polling_duration_sum{task_group=\"availability-recovery\"}[6s])",
           "interval": "",
           "legendFormat": "{{task_name}}",
           "range": true,
@@ -461,7 +461,7 @@
             "uid": "$data_source"
           },
           "editorMode": "code",
-          "expr": "sum(substrate_tasks_polling_duration_sum{}) by ($cpu_group_by)",
+          "expr": "sum(bizinikiwi_tasks_polling_duration_sum{}) by ($cpu_group_by)",
           "interval": "",
           "legendFormat": "{{task_name}}",
           "range": true,