Rename to rpmroute

The router began as a port of FreeRouting and has grown its own engine
(negotiated congestion, tree nets, exact checks, axis escapes), and
'freeroute' was one letter from the project it no longer follows. The
package, module and command are now rpmroute; the freeroute command stays
as an alias, and the RPMROUTE / RPMROUTE_ORACLE_JAVA variables fall back
to the old FREEROUTE names. Version 2026.10.07. Routing is unchanged: a
PCBench board routes to a byte-identical session either way.

tests/ses/test_indent.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from freeroute.ses.indent import Identifier, IndentWriter
+from rpmroute.ses.indent import Identifier, IndentWriter
 
 
 def test_nested_scopes_indent_by_two_spaces():

tests/ses/test_writer.py

@@ -1,7 +1,7 @@
 """End-to-end tests for the SES writer.
 
 Where possible these re-parse the emitted SES with the project's own tokenizer /
-S-expression parser (:mod:`freeroute.dsn.sexp`) and assert structural
+S-expression parser (:mod:`rpmroute.dsn.sexp`) and assert structural
 invariants, mirroring what FreeRouting's ``SesReader`` and ``kicad-cli pcb
 import specctra-ses`` walk: ``session > routes > network_out > net >
 wire(path)/via``.
@@ -13,9 +13,9 @@ from pathlib import Path
 
 import pytest
 
-from freeroute.dsn import parse_dsn
-from freeroute.dsn.sexp import SExp, parse
-from freeroute.ses import RoutedVia, RoutedWire, RoutingResult, write_ses
+from rpmroute.dsn import parse_dsn
+from rpmroute.dsn.sexp import SExp, parse
+from rpmroute.ses import RoutedVia, RoutedWire, RoutingResult, write_ses
 
 FIXTURES = Path(__file__).parent.parent / "dsn" / "fixtures"
 
@@ -142,7 +142,7 @@ def test_round_trip_from_empty_board_fixture():
 
 # --- SES coordinate units ---------------------------------------------------
 # FreeRouting's SesWriter writes coordinates in resolution units, and KiCad's
-# importer and mckicad's ses_apply read them that way. On 2026-09-26 freeroute
+# importer and mckicad's ses_apply read them that way. On 2026-09-26 rpmroute
 # was found writing DSN units instead, so every routed board came back 10x small.
 
 
@@ -155,8 +155,8 @@ def test_round_trip_from_empty_board_fixture():
     ],
 )
 def test_ses_scale(resolution, unit, expected):
-    from freeroute.dsn import parse_dsn
-    from freeroute.ses.writer import ses_scale
+    from rpmroute.dsn import parse_dsn
+    from rpmroute.ses.writer import ses_scale
 
     dsn = parse_dsn(f"(pcb t (parser) {resolution} {unit} (structure) (placement) (library) (network))")
     assert ses_scale(dsn) == pytest.approx(expected)