Bazel-iOS Con 2023: announce/ open call for presentations

docs/2023_bazel_ios_con.md

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+# Bazel-iOS Con 2023: open call for presentations - RSVPs
+
+Congratulations everyone 🎉!  I formally invite you to join us for a day of open
+community and fun, and low level iOS build talks. We'll additionally host a
+number of breakout rooms including: `rules_ios`, new-around-here, and at-scale
+building.
+
+The event will be held on September 27th at $TBD, Oakland, CA from 10:00AM -
+6:00PST. Registration and social hour at 9:00AM. We encorge folks to come IRL
+and will have remote presenters and guests.
+
+This is an _open_ call for talks - _especially for contributors 😊_. Please send
+@jerrymarino a quick description of your proposed - e.g.  directly or email to
+[email protected]. If you're not doing a talk - we invite you to come and enjoy
+it overall.
+
+_we'll update the con doc with RSVP url / details_