Remove fsrecorder utility (migrated to smartem-devtools)

Removes fsrecorder filesystem recording/replay tool from this repository.
The tool has been migrated to smartem-devtools where it belongs as a
developer utility.

Removed:
- tools/fsrecorder/fsrecorder.py
- tools/fsrecorder/example_usage.py
- .github/workflows/build_win_fsrecorder.yml (Windows binary build)
- fsrecorder optional dependency group from pyproject.toml

The E2E test scripts that reference fsrecorder will be migrated separately.

Author: vredchenko

.github/workflows/build_win_fsrecorder.yml

@@ -95,11 +95,6 @@ agent = [
     "watchdog>=4.0.0,<7.0.0",
 ]
 
-# FSRecorder tool dependencies
-fsrecorder = [
-    "watchdog>=4.0.0,<7.0.0",
-]
-
 # Athena API mock server dependencies (optional)
 mock = [
     "smartem-decisions[client]",
@@ -109,7 +104,7 @@ mock = [
 
 # Combined dependencies (for convenience)
 all = [
-    "smartem-decisions[dev,common,client,cli,backend,agent,fsrecorder,mock,images]",
+    "smartem-decisions[dev,common,client,cli,backend,agent,mock,images]",
 ]
 
 [project.scripts]