[jtnelson]

Summary

A release branch or a Renovate branch of data-extract-api builds the plain
version that only master should, such as 1.0.1, and Gradle publishes it to
platform, the releases repository. A feature branch publishes there too. The
published version also loses every digit of a branch's name, so
feature/GH-60-fix publishes as 1.0.1-GH--FIX, and branches that differ only
in their issue number publish the same version.

This adopts the shared version tool, the one set of version rules for every
Cinchapi repo, from cinchapi/cinchapi-agent-skills#70. Part of
cinchapi/cinchapi-agent-skills#67.

Behavior

version.sh is a copy of the shared tool at the pinned commit of .agents, and
every skills pull refreshes it. Gradle and tools/release call it as before.

Branch	Published version	Repository
master	1.0.1	platform
release/*	1.0.1-rc<n>	platform-snapshots
develop	1.0.1-SNAPSHOT	platform-snapshots
any other, such as feature/GH-60-fix	1.0.1-FEATURE-GH-60-FIX	platform-snapshots

Only a plain X.Y.Z goes to the releases repository. A release candidate carries
its build number as -rc<n>, so each candidate is a distinct version.

version.sh X.Y.Z sets .version and changes no other file, since nothing else
in the repo names its version.

The repo now mounts the shared agent skills at .agents, like the other
Cinchapi repos, so each skills pull keeps version.sh current. That adds the
agent instructions, the skill links, and the agent workflow every mounted repo
has.