Add abstract and summary tier files to repository for distribution

Removed *.abstract.md and *.summary.md from .gitignore so they're
included when installing from GitHub clones. These files are needed
by bcs commands like 'codes' and 'about --stats'.

Fixes installation issue where GitHub installs were missing 108 tier
files, causing 'bcs codes' to report "No rule files found".

Author: Test User

.gitignore

@@ -0,0 +1,122 @@
+data.backup*
+.gitignore
+shellcheck
+*.backup*
+BASH-CODING-STYLE.md
+*~
+.*~
+*$py.class
+AUDIT-EVALUATE.md
+*.bak
+build/
+CHANGES.md
+.claude
+.claude/
+CLAUDE.md
+.coverage
+coverage_html/
+curtest.sh
+.dev/
+dev/
+DEVELOPMENT.md
+DISCOVER.md
+dist/
+.DS_Store
+*.egg-info/
+.env
+env/
+ENV/
+.env.local
+.git
+.git/*
+git/
+.gitcommit
+gitcommit
+.gitignore
+gitignore
+.gudang
+gudang
+htmlcov/
+.idea/
+IMPROVEMENTS.md
+index.php
+.ipynb_checkpoints/
+*.json
+*.mp3
+*.old
+.old
+old/
+PURPOSE-FUNCTIONALITY-USAGE.md
+__pycache__
+__pycache__/
+*.py[cod]
+.pytest_cache/
+*.raw
+refactor*
+.script
+*.srt
+*.swo
+*.swp
+.symlink
+t
+t1
+t2
+t3
+t4
+.temp
+temp
+temp/
+t.htm*
+Thumbs.db
+.tmp
+tmp
+tmp/
+t.py
+tt
+tt.htm*
+tt.py
+ttt
+ttt.htm*
+ttt.py
+.venv/
+venv/
+.vscode/
+*.vtt
+*.wav
+ANALYSIS-AND-FIXES.md
+INSTALLATION-SUMMARY.md
+RESTRUCTURE-VALIDATION.md
+
+# Generated rule variants in data/
+# Removed abstract.md and summary.md from gitignore so they're included in distributions
+# data/BASH-CODING-STANDARD.abstract.md
+# data/BASH-CODING-STANDARD.summary.md
+# data/**/*.abstract.md
+# data/**/*.summary.md
+
+# Temporary files
+*.tmp
+.compress_helpers.tmp
+
+# Analysis and planning documents (archived to .gudang/)
+BCS-SHELLCHECK-INTEGRATION.md
+BCS-SHELLCHECK.md
+BCS-SHELLCHECK-STRUCTURAL-ANALYSIS.md
+DEFICIENT-RULES-REPORT.md
+DEVELOPMENT.md
+FUTURE-SUBCOMMANDS.md
+IMPROVEMENTS-NEEDED.md
+REBUTTALS-FAQ.md
+rule-mdfile-format.md
+
+# Legacy scripts
+BASH-CODING-STANDARD.sh
+
+# Builtins build artifacts
+builtins/*.so
+builtins/**/*.o
+builtins/lib/*.a
+
+# Lib sync manifest and script (development environment only)
+lib/.sync-manifest
+lib/sync-lib.sh

data/01-script-structure/00-section.abstract.md

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+# Script Structure & Layout
+
+**Scripts must follow mandatory 13-step layout for consistency and safe initialization.**
+
+Steps: (1) Shebang `#!/usr/bin/env bash`, (2) ShellCheck directives if needed, (3) Brief description comment, (4) `set -euo pipefail`, (5) `shopt -s inherit_errexit shift_verbose extglob nullglob`, (6) Metadata (`VERSION`, `SCRIPT_PATH`, `SCRIPT_DIR`, `SCRIPT_NAME` made `readonly`), (7) Global variables, (8) Colors if terminal output, (9) Utility functions (messaging, helpers), (10) Business logic functions, (11) `main()` for scripts >40 lines, (12) Script invocation `main "$@"`, (13) End marker `#fin`.
+
+**Function organization: bottom-up.** Define messaging functions first (lowest level), then helpers, validators, business logic, with `main()` last (highest orchestration level). Each function safely calls functions defined above it.
+
+**Dual-purpose scripts** (executable and sourceable): Check `[[ ${BASH_SOURCE[0]} != "$0" ]] && return 0` early. When sourced, skip `set -e` to avoid modifying caller's shell.
+
+**FHS compliance:** Install to `/usr/local/share/{org}/{project}/` (local) or `/usr/share/{org}/{project}/` (system). Support uninstalled mode (script directory) for development.
+
+**File extensions:** Omit `.sh` for user-facing commands; use `.sh` for libraries and internal tools.
+
+**Ref:** BCS01

data/01-script-structure/00-section.summary.md

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+# Script Structure & Layout
+
+This section defines the mandatory 13-step structural layout ensuring consistency, maintainability, and safe initialization. Covers organization from shebang through `#fin` marker, including metadata, shopt settings, dual-purpose patterns, FHS compliance, file extensions, and bottom-up function organization where low-level utilities precede high-level orchestration.

data/01-script-structure/01-layout.abstract.md

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+## General Layouts for Standard Script
+
+**Mandatory 13-step structural layout for all Bash scripts.**
+
+### The 13 Steps
+
+1. **Shebang**: `#!/bin/bash` (or `#!/usr/bin/bash`, `#!/usr/bin/env bash`)
+2. **ShellCheck directives** (if needed): `#shellcheck disable=SCxxxx` with comments
+3. **Brief description**: One-line purpose comment
+4. **Error handling**: `set -euo pipefail` (MANDATORY before commands)
+5. **Shell options**: `shopt -s inherit_errexit shift_verbose extglob nullglob`
+6. **Metadata**: `declare -r VERSION SCRIPT_PATH SCRIPT_DIR SCRIPT_NAME` (readonly together)
+7. **Global variables**: Explicit types - `declare -i`, `declare --`, `declare -a`, `declare -A`
+8. **Color definitions** (if terminal output): Conditional with readonly
+9. **Utility functions**: `_msg()`, `vecho()`, `info()`, `warn()`, `error()`, `die()` - lowest level
+10. **Business logic**: Core functions organized bottom-up
+11. **main()**: Required >100 lines; includes argument parsing; readonly after parsing
+12. **Invocation**: `main "$@"` (always quote)
+13. **End marker**: `#fin` or `#end` (MANDATORY)
+
+**Rationale**: Guarantees safe initialization, prevents undefined references, enables testing.
+
+**Anti-pattern**: Missing `set -euo pipefail`, variables before declaration, logic before utilities, no `main()` in large scripts.
+
+**Ref:** BCS0101