Clean up scr/ directory (#1634)

* remove scr/abjad-log
* remove scr/fix-tests
* remove scr/make-packaging-transcript
* remove scr/trash

OLD: scr/abjad
NEW: scr/abjad.py

OLD: scr/prime-parser-tables
NEW: scr/prime_parser_tables.py

OLD: scr/timer
NEW: scr/timer.py

OLD: scr/write-parser-syntax-skeleton
NEW: scr/write_parser_syntax_skeleton.py

.github/workflows/main.yml

@@ -87,7 +87,7 @@ jobs:
       run: |
         python -m pip install .[dev]
         python -c "import abjad; print(abjad.Configuration().configuration_file_path)"
-        python scr/prime-parser-tables
+        python scr/prime_parser_tables.py
 
     - name: Run checks
       run: |

abjad/contextmanagers.py

@@ -703,7 +703,7 @@ def __enter__(self) -> "Timer":
         self._stop_time = None
         self._start_time = time.time()
         if self.print_continuously_from_background:
-            path = configuration.abjad_directory.parent / "scr" / "timer"
+            path = configuration.abjad_directory.parent / "scr" / "timer.py"
             interval = str(int(self.print_continuously_from_background))
             process = subprocess.Popen([path, interval], shell=False)
             self._process = process

scr/start_abjad.py

@@ -0,0 +1,19 @@
+#! /usr/bin/env python
+import sys
+
+import abjad
+
+
+def main():
+    try:
+        file_name = sys.argv[1]
+    except IndexError:
+        file_name = ""
+    startup_string = f"Abjad {abjad.__version__}"
+    commands = f"import abjad; print({startup_string!r});"
+    string = rf'''python -i {file_name} -c "{commands}"'''
+    abjad.io.spawn_subprocess(string)
+
+
+if __name__ == "__main__":
+    main()

scr/timer → scr/timer.py

@@ -1,4 +1,9 @@
 #! /usr/bin/env python
+
+"""
+Called by abjad.contextmanager.Timer on __enter__().
+"""
+
 import sys
 import time