probes: add probe-config profiles loaded from probes.yaml

- new modules/probes/ parses probes.yaml (libyaml): a defaults: map
  applied on every jtag_open + named profiles: selected with
  `jtag_open <idx> <profile>` (jtag_profiles lists them); each value is
  pushed into the script envvar store the driver reads at open time
- ships a flashpro profile (ADBUS4 high-Z) that lets the IGLOO2 kit's
  embedded FlashPro (FT4232H, port 0) detect the chain
- CLAUDE.md: decision entry for probes.yaml + a design note on the
  probe / JTAG-link / device config strategy (driver-neutral link layer)

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

modules/probes/CMakeLists.txt

@@ -0,0 +1,12 @@
+set(SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+
+file(GLOB_RECURSE ALL_SOURCES "*.c")
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/..)
+
+add_library(probes ${ALL_SOURCES})
+
+# probes.yaml is parsed at runtime via libyaml (same as the fpga module).
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(YAML REQUIRED IMPORTED_TARGET yaml-0.1)
+target_link_libraries(probes PUBLIC PkgConfig::YAML)