feat(enable): add ralph-enable wizard for existing projects (v0.11.0) (#124)

* feat(enable): add ralph-enable wizard for existing projects (v0.11.0)

Add interactive wizard and CI version for enabling Ralph in existing projects.

New commands:
- ralph-enable: Interactive 5-phase wizard for humans
- ralph-enable-ci: Non-interactive version with JSON output for CI/automation

New library components:
- lib/enable_core.sh: Shared logic for idempotency, project detection, templates
- lib/wizard_utils.sh: Interactive prompt utilities
- lib/task_sources.sh: Task import from beads, GitHub Issues, PRD documents

Features:
- Auto-detects project type (TypeScript, Python, Rust, Go)
- Auto-detects framework (Next.js, FastAPI, Django, Express)
- Imports tasks from beads, GitHub Issues, or PRD documents
- Generates .ralphrc project configuration file
- Idempotent: safe to run multiple times, respects existing files
- Exit codes: 0 (success), 1 (error), 2 (already enabled)

Updated:
- install.sh: Added new commands to global installation
- ralph_loop.sh: Loads .ralphrc configuration at startup

Tests: 75 new tests (30 enable_core + 23 task_sources + 22 integration)
Total: 396 tests passing (100% pass rate)

Closes #85, #121, #64, #87, #99

* fix(enable): address code review feedback

Fixes from PR #124 review:

1. sed -i portability (ralph_enable.sh:456)
   - Use portable sed + mv pattern instead of GNU-only sed -i

2. sed regex portability (lib/task_sources.sh)
   - Replace \s with POSIX [[:space:]] character class
   - Add sed -E flag for extended regex

3. jq availability check (ralph_enable_ci.sh:177)
   - Add check for jq when --json flag is used

4. Unused filter parameter (lib/task_sources.sh:44)
   - Pass filter to bd list --filter command

5. Word-splitting in select_multiple (ralph_enable.sh:322)
   - Return comma-separated indices instead of space-separated text
   - Update caller to parse indices correctly

6. Missing || true for check_existing_ralph (ralph_enable.sh:185)
   - Prevent set -e from exiting on non-zero return

7. select_multiple stdout corruption (lib/wizard_utils.sh)
   - Redirect interactive output to stderr
   - Only final result goes to stdout

8. Color variables not exported (lib/wizard_utils.sh:12)
   - Export WIZARD_* color variables for subshells

9. select_option infinite loop (lib/wizard_utils.sh:179)
   - Add guard for empty options array

* fix(tests): add missing mocks and exports for new enable feature

- Add RESPONSE_ANALYSIS_FILE export to test_session_continuity.bats setup
- Add mock ralph_enable.sh and ralph_enable_ci.sh to test_installation.bats
- Add mock lib files: enable_core.sh, wizard_utils.sh, task_sources.sh, timeout_utils.sh

All 396 tests now pass.

* fix(config): fix critical issues from PR review

1. .ralphrc Configuration Loading Fix:
   - Captured env var state BEFORE setting defaults with _env_* variables
   - load_ralphrc now only restores values explicitly set by environment
   - .ralphrc settings are now properly applied (not overwritten by defaults)

2. sed Command Injection Fix:
   - Replaced sed with awk for .ralphrc updates in ralph_enable.sh
   - awk -v pattern safely handles user input without shell injection risk

3. Shell Injection Fix in safe_create_file():
   - Replaced echo with printf '%s\n' for safer content handling
   - Prevents issues with backslashes, -n, and special characters

4. Specific Error Codes:
   - Added ENABLE_INVALID_ARGS=3 for argument errors
   - Added ENABLE_FILE_NOT_FOUND=4 for missing files
   - Added ENABLE_DEPENDENCY_MISSING=5 for missing deps (e.g., jq)
   - Added ENABLE_PERMISSION_DENIED=6 for permission errors
   - Updated ralph_enable.sh and ralph_enable_ci.sh to use specific codes

5. Added tests for .ralphrc loading pattern verification

Test count: 398 (up from 396)

* fix(enable): make --force flag actually overwrite existing files

The --force flag was accepted but safe_create_file() always skipped
existing files regardless of ENABLE_FORCE value.

Changes:
- safe_create_file() now checks ENABLE_FORCE environment variable
- When ENABLE_FORCE="true", overwrites existing files instead of skipping
- Added proper logging for overwrite operations

Added tests:
- Verify enable_ralph_in_directory actually changes file contents with --force
- Test safe_create_file overwrites when ENABLE_FORCE is true
- Test safe_create_file skips when ENABLE_FORCE is false

Test count: 400 (up from 398)

---------

Co-authored-by: Test User <test@example.com>

tests/unit/test_session_continuity.bats

@@ -27,6 +27,7 @@ setup() {
     export CLAUDE_SESSION_FILE="$RALPH_DIR/.claude_session_id"
     export RALPH_SESSION_FILE="$RALPH_DIR/.ralph_session"
     export RALPH_SESSION_HISTORY_FILE="$RALPH_DIR/.ralph_session_history"
+    export RESPONSE_ANALYSIS_FILE="$RALPH_DIR/.response_analysis"
     export CLAUDE_MIN_VERSION="2.0.76"
     export CLAUDE_CODE_CMD="claude"
     export CLAUDE_USE_CONTINUE="true"