feat/show-process-list:

 ### Implement Process Management Enhancements

 - **Error Handling Enhancements**:
   - Added new error variants `BumpSequence`, `StartReportTask`, `ReportProcess`, and `BuildProcessManager` in `error.rs` to improve error handling for process management tasks.
   - Updated `ErrorExt` implementations to handle new error types.

 - **Process Manager Improvements**:
   - Introduced `ProcessManager` enhancements in `process_manager.rs` to manage process states using `ProcessWithState` and `ProcessState` enums.
   - Implemented periodic task `ReportTask` to report running queries to the KV backend.
   - Modified `register_query` and `deregister_query` methods to use the new state management system.

 - **Testing and Validation**:
   - Updated tests in `process_manager.rs` to validate new process management logic.
   - Replaced `dump` method with `list_all_processes` for listing processes.

 - **Integration with Frontend and Standalone**:
   - Updated `frontend.rs` and `standalone.rs` to handle `ProcessManager` initialization errors using `BuildProcessManager` error variant.

 - **Schema Adjustments**:
   - Modified `process_list.rs` in `system_schema/information_schema` to use the updated process listing method.

 - **Key-Value Conversion**:
   - Added `TryFrom` implementation for converting `Process` to `KeyValue` in `process_list.rs`.

Author: v0y4g3r

src/catalog/src/error.rs

@@ -278,12 +278,33 @@ pub enum Error {
         location: Location,
     },
 
+    #[snafu(display("Failed to bump sequence for process manager"))]
+    BumpSequence {
+        source: common_meta::error::Error,
+        #[snafu(implicit)]
+        location: Location,
+    },
+
     #[snafu(display("Failed to list running processes"))]
     ListProcess {
         source: common_meta::error::Error,
         #[snafu(implicit)]
         location: Location,
     },
+
+    #[snafu(display("Failed to start process report task"))]
+    StartReportTask {
+        source: common_runtime::error::Error,
+        #[snafu(implicit)]
+        location: Location,
+    },
+
+    #[snafu(display("Failed to report process state"))]
+    ReportProcess {
+        source: common_meta::error::Error,
+        #[snafu(implicit)]
+        location: Location,
+    },
 }
 
 impl Error {
@@ -351,7 +372,10 @@ impl ErrorExt for Error {
             Error::TableMetadataManager { source, .. } => source.status_code(),
             Error::GetViewCache { source, .. }
             | Error::GetTableCache { source, .. }
-            | Error::ListProcess { source, .. } => source.status_code(),
+            | Error::BumpSequence { source, .. }
+            | Error::ListProcess { source, .. }
+            | Error::ReportProcess { source, .. } => source.status_code(),
+            Error::StartReportTask { .. } => StatusCode::Internal,
         }
     }