Add repo scaffolding for Colorado-Mesh publish

Adds the project metadata and CI/release workflow needed to publish this
repo under Colorado-Mesh/meshcore-bot-firmware.

- LICENSE: MIT with attribution to upstream MeshCore (also MIT)
- README: rewritten with badges, supported boards, install paths (web
  flasher / PlatformIO / esptool), bot command table, layout map,
  development quickstart
- CONTRIBUTING: submodule + patch-queue workflow, what-goes-where,
  patch hygiene rules, PR expectations
- RELEASE: cmesh-bot-vX.Y.Z tag scheme + procedure
- CHANGELOG: Keep-a-Changelog format, seeded with the hop-coordination
  fix and patch-5 utility commands
- Issue templates: bug_report (with bot stats prompt), feature_request,
  config.yml (no blank issues, link to upstream + community)
- Pull request template: layer checklist, verification gates,
  prefs-schema impact prompt
- .github/workflows/firmware-build.yml: keep PR check on representative
  envs (Heltec V3, RAK 4631 USB+BLE), add concurrency cancellation for
  PRs, scope cache key to PIO config hash
- .github/workflows/release.yml: NEW; triggers on cmesh-bot-v* tag or
  manual dispatch, enumerates all 133 *_companion_radio_(usb|ble) envs
  from vendor/MeshCore/variants/, shards across 8 parallel matrix jobs,
  aggregates artifacts into a single draft release
- scripts/verify.sh: respect MESHCORE_SKIP_APPLY_PATCHES like
  build-representative.sh does, so verify works when vendor already has
  patches applied as commits
- .gitignore: add .forge.bak.*/ for forge backup directories

scripts/verify.sh

@@ -42,7 +42,9 @@ if [ ! -d "${MESHCORE_DIR}/.git" ] && [ ! -f "${MESHCORE_DIR}/.git" ]; then
   exit 1
 fi
 
-if ! git -C "${MESHCORE_DIR}" diff --quiet --cached || ! git -C "${MESHCORE_DIR}" diff --quiet || [ -n "$(git -C "${MESHCORE_DIR}" ls-files --others --exclude-standard)" ]; then
+if [ "${MESHCORE_SKIP_APPLY_PATCHES:-0}" = "1" ]; then
+  echo "Skipping MeshCore patch application; using current vendor/MeshCore tree."
+elif ! git -C "${MESHCORE_DIR}" diff --quiet --cached || ! git -C "${MESHCORE_DIR}" diff --quiet || [ -n "$(git -C "${MESHCORE_DIR}" ls-files --others --exclude-standard)" ]; then
   echo "MeshCore submodule is dirty; verify existing patched tree without applying patches."
 else
   "${MESHCORE_FW_ROOT}/scripts/apply-patches.sh"