docs(AGENTS.md): Update RTK section and add style system docs

mise.toml

@@ -21,18 +21,18 @@ pkl = "latest"
 [tasks.compile]
 description = "Compile (uses BOARD env var)"
 depends = ["gen-compile-commands"]
-run = """
+run = '''
 source ./boards/$BOARD/board-config.sh
 arduino-cli compile --fqbn "$FQBN" --libraries ./libraries $LIBS --build-property "compiler.cpp.extra_flags=$OPTS" --warnings default ./boards/$BOARD
-"""
+'''
 
 [tasks.upload]
 description = "Upload (uses BOARD env var)"
 depends = ["kill"]
-run = """
+run = '''
 source ./boards/$BOARD/board-config.sh
 arduino-cli upload --fqbn "$FQBN" --port "$PORT" ./boards/$BOARD
-"""
+'''
 
 [tasks.monitor-raw]
 depends = ["kill"]