Add standardised bump-version.sh script

Unified version bumping across all Allow2 SDKs:
  ./scripts/bump-version.sh prerelease --preid alpha
  ./scripts/bump-version.sh [patch|minor|major]

Handles language-specific version formats (npm, PEP 440,
Gradle, .csproj, CMake, git tags), commits, and tags.

Co-Authored-By: claude-flow <ruv@ruv.net>

Author: Allow2CEO

scripts/bump-version.sh

@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+# bump-version.sh — Standardised version bumping for Allow2 Python SDK
+# Usage: ./scripts/bump-version.sh [prerelease|patch|minor|major] [--preid alpha|beta|rc]
+#
+# Python uses PEP 440: 2.0.0a1 (alpha), 2.0.0b1 (beta), 2.0.0rc1 (release candidate)
+#
+# Examples:
+#   ./scripts/bump-version.sh prerelease --preid alpha   # 2.0.0a1 → 2.0.0a2
+#   ./scripts/bump-version.sh prerelease --preid beta    # 2.0.0a2 → 2.0.0b1
+#   ./scripts/bump-version.sh patch                       # 2.0.0a2 → 2.0.1
+#   ./scripts/bump-version.sh minor                       # 2.0.1 → 2.1.0
+#   ./scripts/bump-version.sh major                       # 2.1.0 → 3.0.0
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+VERSION_FILE="pyproject.toml"
+BUMP="${1:-prerelease}"
+PREID=""
+if [[ "${2:-}" == "--preid" ]]; then PREID="${3:-alpha}"; fi
+
+# Map preid to PEP 440 suffix
+pep440_suffix() {
+  case "$1" in
+    alpha) echo "a" ;;
+    beta)  echo "b" ;;
+    rc)    echo "rc" ;;
+    *)     echo "a" ;;
+  esac
+}
+
+# Read current version from pyproject.toml
+OLD=$(grep '^version = ' "$VERSION_FILE" | head -1 | sed 's/version = "\(.*\)"/\1/')
+
+# Parse version: 2.0.0a1 → major=2 minor=0 patch=0 pre_type=a pre_num=1
+if [[ "$OLD" =~ ^([0-9]+)\.([0-9]+)\.([0-9]+)(a|b|rc)?([0-9]+)?$ ]]; then
+  MAJOR="${BASH_REMATCH[1]}"
+  MINOR="${BASH_REMATCH[2]}"
+  PATCH="${BASH_REMATCH[3]}"
+  PRE_TYPE="${BASH_REMATCH[4]:-}"
+  PRE_NUM="${BASH_REMATCH[5]:-}"
+else
+  echo "Cannot parse version: $OLD" >&2; exit 1
+fi
+
+case "$BUMP" in
+  prerelease)
+    SUFFIX=$(pep440_suffix "${PREID:-alpha}")
+    if [[ "$PRE_TYPE" == "$SUFFIX" && -n "$PRE_NUM" ]]; then
+      NEW="${MAJOR}.${MINOR}.${PATCH}${SUFFIX}$((PRE_NUM + 1))"
+    else
+      NEW="${MAJOR}.${MINOR}.${PATCH}${SUFFIX}1"
+    fi
+    ;;
+  patch)
+    NEW="$MAJOR.$MINOR.$((PATCH + 1))"
+    ;;
+  minor)
+    NEW="$MAJOR.$((MINOR + 1)).0"
+    ;;
+  major)
+    NEW="$((MAJOR + 1)).0.0"
+    ;;
+  *)
+    echo "Usage: $0 [prerelease|patch|minor|major] [--preid alpha|beta|rc]" >&2
+    exit 1
+    ;;
+esac
+
+# Write back
+sed -i "s/^version = \"${OLD}\"/version = \"${NEW}\"/" "$VERSION_FILE"
+
+echo "$OLD → $NEW"
+git add "$VERSION_FILE"
+git commit -m "v$NEW"
+# Tag uses semver format for CI publish workflow
+TAG="v${MAJOR}.${MINOR}.${PATCH}"
+if [[ "$NEW" != "${MAJOR}.${MINOR}.${PATCH}" ]]; then
+  # Convert PEP 440 back to semver for tag: 2.0.0a2 → v2.0.0-alpha.2
+  TAG_PRE=$(echo "$NEW" | sed "s/${MAJOR}\.${MINOR}\.${PATCH}//")
+  TAG_PRE=$(echo "$TAG_PRE" | sed 's/^a/-alpha./; s/^b/-beta./; s/^rc/-rc./')
+  TAG="v${MAJOR}.${MINOR}.${PATCH}${TAG_PRE}"
+fi
+git tag "$TAG"
+echo "Tagged $TAG — push with: git push origin master --tags"