init: add AI engineer guidance and knowledgebase documents

98_AI_workspace/software-engineer/002_guideline.md

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+# guideline
+
+## principles
+
+- at any time, please keep your answer, solution, explanation simple and short (K.I.S.S. / 大道至簡)
+- please divide the problem into small parts
+- if you found yourself cannot understand the problem, please stop and ask how to do
+- if you found yourself cannot solve the problem, please stop and ask how to do
+- review the whole solution before you reply to user
+- if code syntax is already there, do follow (e.g. naming convention, syntax) the existing code
+- no need to explain the reason until you are told to do so
+- no need to show me the code change, at the end just simple summary in point form is ok
+
+## highlighted project directories and their meanings
+
+- `_ignore_this_directory` please ignore this directory and any files inside it
+
+- `01_Requirements` documentation of this project
+- `03_source` source code of this project
+
+- if the directory contains `_GUIDELINES.md`, please read it before operation
+
+## Abbreviations
+
+T.B.A.