feat: integrate framework files into monorepo under packages/mosaic/framework/

Moves all Mosaic framework runtime files from the separate bootstrap repo
into the monorepo as canonical source. The @mosaic/mosaic npm package now
ships the complete framework — bin scripts, runtime configs, tools, and
templates — enabling standalone installation via npm install.

Structure:
  packages/mosaic/framework/
  ├── bin/          28 CLI scripts (mosaic, mosaic-doctor, mosaic-sync-skills, etc.)
  ├── runtime/      Runtime adapters (claude, codex, opencode, pi, mcp)
  ├── tools/        Shell tooling (git, prdy, orchestrator, quality, etc.)
  ├── templates/    Agent and repo templates
  ├── defaults/     Default identity files (AGENTS.md, STANDARDS.md, SOUL.md, etc.)
  ├── install.sh    Legacy bash installer
  └── remote-install.sh  One-liner remote installer

Key files with Pi support and recent fixes:
- bin/mosaic: launch_pi() with skills-local loop
- bin/mosaic-doctor: --fix auto-wiring for all 4 harnesses
- bin/mosaic-sync-skills: Pi as 4th link target, symlink-aware find
- bin/mosaic-link-runtime-assets: Pi settings.json patching
- bin/mosaic-migrate-local-skills: Pi skill roots, symlink find
- runtime/pi/RUNTIME.md + mosaic-extension.ts

Package ships 251 framework files in the npm tarball (278KB compressed).

packages/mosaic/framework/tools/git/pr-create.sh

@@ -0,0 +1,164 @@
+#!/bin/bash
+# pr-create.sh - Create pull requests on Gitea or GitHub
+# Usage: pr-create.sh -t "Title" [-b "Body"] [-B base] [-H head] [-l "labels"] [-m "milestone"]
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/detect-platform.sh"
+
+# Default values
+TITLE=""
+BODY=""
+BASE_BRANCH=""
+HEAD_BRANCH=""
+LABELS=""
+MILESTONE=""
+DRAFT=false
+ISSUE=""
+
+usage() {
+    cat <<EOF
+Usage: $(basename "$0") [OPTIONS]
+
+Create a pull request on the current repository (Gitea or GitHub).
+
+Options:
+    -t, --title TITLE       PR title (required, or use --issue)
+    -b, --body BODY         PR description/body
+    -B, --base BRANCH       Base branch to merge into (default: main/master)
+    -H, --head BRANCH       Head branch with changes (default: current branch)
+    -l, --labels LABELS     Comma-separated labels
+    -m, --milestone NAME    Milestone name
+    -i, --issue NUMBER      Link to issue (auto-generates title if not provided)
+    -d, --draft             Create as draft PR
+    -h, --help              Show this help message
+
+Examples:
+    $(basename "$0") -t "Add login feature" -b "Implements user authentication"
+    $(basename "$0") -t "Fix bug" -B main -H feature/fix-123
+    $(basename "$0") -i 42 -b "Implements the feature described in #42"
+    $(basename "$0") -t "WIP: New feature" --draft
+EOF
+    exit 1
+}
+
+# Parse arguments
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        -t|--title)
+            TITLE="$2"
+            shift 2
+            ;;
+        -b|--body)
+            BODY="$2"
+            shift 2
+            ;;
+        -B|--base)
+            BASE_BRANCH="$2"
+            shift 2
+            ;;
+        -H|--head)
+            HEAD_BRANCH="$2"
+            shift 2
+            ;;
+        -l|--labels)
+            LABELS="$2"
+            shift 2
+            ;;
+        -m|--milestone)
+            MILESTONE="$2"
+            shift 2
+            ;;
+        -i|--issue)
+            ISSUE="$2"
+            shift 2
+            ;;
+        -d|--draft)
+            DRAFT=true
+            shift
+            ;;
+        -h|--help)
+            usage
+            ;;
+        *)
+            echo "Unknown option: $1" >&2
+            usage
+            ;;
+    esac
+done
+
+# If no title but issue provided, generate title
+if [[ -z "$TITLE" ]] && [[ -n "$ISSUE" ]]; then
+    TITLE="Fixes #$ISSUE"
+fi
+
+if [[ -z "$TITLE" ]]; then
+    echo "Error: Title is required (-t) or provide an issue (-i)" >&2
+    usage
+fi
+
+# Default head branch to current branch
+if [[ -z "$HEAD_BRANCH" ]]; then
+    HEAD_BRANCH=$(git branch --show-current)
+fi
+
+# Add issue reference to body if provided
+if [[ -n "$ISSUE" ]]; then
+    if [[ -n "$BODY" ]]; then
+        BODY="$BODY
+
+Fixes #$ISSUE"
+    else
+        BODY="Fixes #$ISSUE"
+    fi
+fi
+
+PLATFORM=$(detect_platform)
+
+case "$PLATFORM" in
+    github)
+        CMD="gh pr create --title \"$TITLE\""
+        [[ -n "$BODY" ]] && CMD="$CMD --body \"$BODY\""
+        [[ -n "$BASE_BRANCH" ]] && CMD="$CMD --base \"$BASE_BRANCH\""
+        [[ -n "$HEAD_BRANCH" ]] && CMD="$CMD --head \"$HEAD_BRANCH\""
+        [[ -n "$LABELS" ]] && CMD="$CMD --label \"$LABELS\""
+        [[ -n "$MILESTONE" ]] && CMD="$CMD --milestone \"$MILESTONE\""
+        [[ "$DRAFT" == true ]] && CMD="$CMD --draft"
+        eval "$CMD"
+        ;;
+    gitea)
+        # tea pull create syntax
+        CMD="tea pr create --title \"$TITLE\""
+        [[ -n "$BODY" ]] && CMD="$CMD --description \"$BODY\""
+        [[ -n "$BASE_BRANCH" ]] && CMD="$CMD --base \"$BASE_BRANCH\""
+        [[ -n "$HEAD_BRANCH" ]] && CMD="$CMD --head \"$HEAD_BRANCH\""
+
+        # Handle labels for tea
+        if [[ -n "$LABELS" ]]; then
+            # tea may use --labels flag
+            CMD="$CMD --labels \"$LABELS\""
+        fi
+
+        # Handle milestone for tea
+        if [[ -n "$MILESTONE" ]]; then
+            MILESTONE_ID=$(tea milestones list 2>/dev/null | grep -E "^\s*[0-9]+" | grep "$MILESTONE" | awk '{print $1}' | head -1)
+            if [[ -n "$MILESTONE_ID" ]]; then
+                CMD="$CMD --milestone $MILESTONE_ID"
+            else
+                echo "Warning: Could not find milestone '$MILESTONE', creating without milestone" >&2
+            fi
+        fi
+
+        # Note: tea may not support --draft flag in all versions
+        if [[ "$DRAFT" == true ]]; then
+            echo "Note: Draft PR may not be supported by your tea version" >&2
+        fi
+
+        eval "$CMD"
+        ;;
+    *)
+        echo "Error: Could not detect git platform" >&2
+        exit 1
+        ;;
+esac