Auto-generated API doc: doxygen → custom Python emitter → doc/api/.

`cmake --build build --target doc` runs Doxygen to produce XML, then
`doc/gen_api_md.py` (~330 lines, stdlib-only) emits a Markdown tree
under `doc/api/` that gitea renders directly in its file browser.

- 24 class/struct pages + 51 source-file pages + indices, with source
  links of the form `../../../../src/...#L42` that gitea turns into
  clickable line-anchored links.
- Doxyfile.in templated by CMake (XML-only output to build/doc/xml/).
- Pure Python emitter, zero external deps — no doxybook2 (not packaged
  on Arch) and no moxygen (avoids Node).
- Target gracefully disabled if Doxygen or Python 3 is missing at
  configure time; regular build target unaffected.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

doc/api/classes/ImportMentor.md

@@ -0,0 +1,43 @@
+# ImportMentor
+
+`class ImportMentor` — inherits [ImportBase](../classes/ImportBase.md)
+
+Defined in [import_mentor.hpp:8](../../../../src/imports/import_mentor.hpp#L8)
+
+## Public Functions
+
+### `ImportMentor(std::string filename)`
+
+📍 [import_mentor.hpp:11](../../../../src/imports/import_mentor.hpp#L11)
+
+Constructor for [ImportMentor](../classes/ImportMentor.md)..
+
+Initializes the base class with the provided filename.
+
+**Parameters**
+
+- `filename` — Name of the file to be imported.
+
+### `void parse(Signals *signals) override`
+
+📍 [import_mentor.hpp:12](../../../../src/imports/import_mentor.hpp#L12)
+
+Parses the file to extract parts, pins, and signals.
+
+This method reads the file line by line, identifies parts and pins using regular expressions, and associates them with signals.
+
+**Parameters**
+
+- `signals` — Pointer to the [Signals](../classes/Signals.md) object used for managing signal connections.
+
+### `~ImportMentor()`
+
+📍 [import_mentor.hpp:13](../../../../src/imports/import_mentor.hpp#L13)
+
+Destructor for [ImportMentor](../classes/ImportMentor.md)..
+
+Ensures proper cleanup by calling the base class destructor.
+
+---
+
+← [Back to classes](index.md) · [Top](../index.md)