Vendor the maj0sted track layout library and link it into the editor

Drop-in copy of C:\Users\maj00r\Projects\maj0sted-master minus its web/
directory - the WASM frontend is not being ported, the editor drives the
same C++ API natively. What is left is plain C++20 with no dependencies:
domain model (niweleta, plan and profile geometry, fitting, parallelism),
project serialization, rail sampling and the editor document.

src/web/ribbon.cpp was missing from the library source list; added, since
without it the ribbon symbols never make it into the archive.

maj0sted/.gitignore

@@ -0,0 +1,24 @@
+# Build output
+/build/
+/out/
+/cmake-build-*/
+
+# Compiled objects / archives
+*.o
+*.obj
+*.a
+*.lib
+*.so
+*.dylib
+
+# Editors / IDEs
+.vscode/
+.idea/
+*.swp
+.cache/
+compile_commands.json
+
+# WASM / web build artifacts (produced by web/build.sh)
+web/maj0sted.js
+web/maj0sted.wasm
+web/serve