refactor(tooling): merge redmine-cli into tooling-cli/redmine

Consolidate the redmine-cli source into tooling-cli/redmine/
(CLI source, Dockerfile, README, AGENTS.md) with all documentation
rewritten to invoke the container via raw docker run and credentials
from the centralized ~/.creds/redmine.env store. No bin/ wrapper, no
system-dependent paths in the docs.

Removes the old redmine-cli/ subdirectory, updates the
KNELCredsManager consumer table, and updates STATUS.md + AGENTS.md
to reference the new location and registry image.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

tooling-cli/redmine/.env.example

@@ -0,0 +1,4 @@
+# Redmine connection details
+# Copy this file to .env and fill in real values. The .env file is gitignored.
+REDMINE_URL=https://redmine.example.com
+REDMINE_API_KEY=your-api-key-here