Restructure to skill-manager conventions

- Move the TypeScript project under scripts/ (src, tsconfig,
  package.json, pnpm lockfile/workspace, canonical .gitignore);
  drop the npm package-lock
- Add scripts/Taskfile.yml aggregator plus .scripts modules
  (loggers, base, cli) with build, run, and validate tasks
- Move the six SKILL-*.md docs into references/ with kebab names
  and extract the connector-routing sections from SKILL.md into
  references/routing-best-practices.md (SKILL.md 666 -> ~310 lines)
- Add license/metadata/compatibility frontmatter, an Available
  scripts section, and update all CLI paths in README and references

skill-manager validate: 13/13 passed, 0 warnings.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/.scripts/base/lib/-ensure-environment-variable.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# -------------------------------------------------------------------------------------
+#
+#
+#
+# -------------------------------------------------------------------------------------
+
+. ./.scripts/loggers/lib/--index-api.sh
+
+_base_ensureEnvironmentVariable() {
+  local FUNCTION_NAME="_base_ensureEnvironmentVariable"
+  local ENV_VAR_NAME="$1"
+  _loggers_info "${FUNCTION_NAME}" "ENV_VAR_NAME: ${ENV_VAR_NAME}"
+  if [ -z "${!ENV_VAR_NAME}" ]; then
+    _loggers_error "${FUNCTION_NAME}" "Missing required environment variable: ${ENV_VAR_NAME}. Check .env or .env-* files!"
+    exit 1
+  fi
+}