Add TIMEOUT to CREATE INDEX example

Summary

• Add TIMEOUT to example

• architecture/rpc_api.md: encoding peculiarities

(cherry picked from commit db837fb6)

• architecture/rpc_api.md: add proc_sql_execute

(cherry picked from commit a86add2b)

• architecture/rpc_api.md: actualize proc_sql

(cherry picked from commit 5117882e)

• system_tables.md: sync with 24.4.1

• ci: start branch 24.4

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• Close #...
• Cherry-pick to: none / 24.4 / 24.3 / 24.2
• Staging: https://docs.binary.picodata.io/picodata/