MINIFICPP-2690 Simplify AgentDocs

[martinzink]

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[szaszm]

I see these errors in the CI linter job:

2025-11-18T07:37:44.5872514Z minifi-api/include/minifi-c/minifi-c.h:219:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:44.8682008Z minifi-api/include/minifi-cpp/core/ControllerServiceApi.h:29:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [4]
2025-11-18T07:37:44.8922217Z minifi-api/include/minifi-cpp/core/DynamicProperty.h:30:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [4]
2025-11-18T07:37:44.9368808Z minifi-api/include/minifi-cpp/core/OutputAttribute.h:34:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [4]
2025-11-18T07:37:50.4177139Z libminifi/src/minifi-c.cpp:350:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:50.4292092Z libminifi/src/minifi-c.cpp:420:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:50.4297971Z libminifi/src/minifi-c.cpp:424:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:50.4314965Z libminifi/src/minifi-c.cpp:435:  Lines should be <= 200 characters long  [whitespace/line_length] [2]

[martinzink]

I see these errors in the CI linter job:

2025-11-18T07:37:44.5872514Z minifi-api/include/minifi-c/minifi-c.h:219:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:44.8682008Z minifi-api/include/minifi-cpp/core/ControllerServiceApi.h:29:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [4]
2025-11-18T07:37:44.8922217Z minifi-api/include/minifi-cpp/core/DynamicProperty.h:30:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [4]
2025-11-18T07:37:44.9368808Z minifi-api/include/minifi-cpp/core/OutputAttribute.h:34:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [4]
2025-11-18T07:37:50.4177139Z libminifi/src/minifi-c.cpp:350:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:50.4292092Z libminifi/src/minifi-c.cpp:420:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:50.4297971Z libminifi/src/minifi-c.cpp:424:  Lines should be <= 200 characters long  [whitespace/line_length] [2]
2025-11-18T07:37:50.4314965Z libminifi/src/minifi-c.cpp:435:  Lines should be <= 200 characters long  [whitespace/line_length] [2]

Yeah those come from the c-api PR (I've targeted that instead of main)