Create readme.md for Bangkok Meetup

Author: chetuquib

2025-meetup-bangkok-1/readme.md

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+This event was held on 16 September 2025 in Bangkok, Thailand at Tao Bin's office.
+
+https://www.meetup.com/clickhouse-thailand-meetup-group/events/310647332/
+
+The agenda was as follows:
+* 6:30 PM: Registration, dinner & networking
+* 7:00 PM: Welcome and Introductions
+* 7:05 PM: An Introduction to ClickHouse
+* 7:30 PM: The story of how TAOBIN accelerated analytic query from many-minutes to sub-seconds using ClickHouse
+* 8:00 PM: Q&A, networking
+* 8:30 PM: Wrap-up