Add code quality tools and configuration

- Add qlty configuration for automated code quality checks
- Add RuboCop configuration with Ruby style guidelines
- Include quality checks in CI pipeline
- Configure coverage reporting with JSON formatter for qlty
- Set up automated quality gates and metrics tracking

Author: voltechs

.qlty/.gitignore

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+*
+!configs
+!configs/**
+!hooks
+!hooks/**
+!qlty.toml
+!.gitignore

.qlty/configs/.yamllint.yaml

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+rules:
+  document-start: disable
+  quoted-strings:
+    required: only-when-needed
+    extra-allowed: ["{|}"]
+  key-duplicates: {}
+  octal-values:
+    forbid-implicit-octal: true

.qlty/qlty.toml

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+# This file was automatically generated by `qlty init`.
+# You can modify it to suit your needs.
+# We recommend you to commit this file to your repository.
+#
+# This configuration is used by both Qlty CLI and Qlty Cloud.
+#
+#     Qlty CLI -- Code quality toolkit for developers
+#     Qlty Cloud -- Fully automated Code Health Platform
+#
+# Try Qlty Cloud: https://qlty.sh
+#
+# For a guide to configuration, visit https://qlty.sh/d/config
+# Or for a full reference, visit https://qlty.sh/d/qlty-toml
+config_version = "0"
+
+exclude_patterns = [
+  "*_min.*",
+  "*-min.*",
+  "*.min.*",
+  "**/.yarn/**",
+  "**/*.d.ts",
+  "**/assets/**",
+  "**/bower_components/**",
+  "**/build/**",
+  "**/cache/**",
+  "**/config/**",
+  "**/db/**",
+  "**/deps/**",
+  "**/dist/**",
+  "**/extern/**",
+  "**/external/**",
+  "**/generated/**",
+  "**/Godeps/**",
+  "**/gradlew/**",
+  "**/mvnw/**",
+  "**/node_modules/**",
+  "**/protos/**",
+  "**/seed/**",
+  "**/target/**",
+  "**/templates/**",
+  "**/testdata/**",
+  "**/vendor/**",
+]
+
+test_patterns = [
+  "**/test/**",
+  "**/spec/**",
+  "**/*.test.*",
+  "**/*.spec.*",
+  "**/*_test.*",
+  "**/*_spec.*",
+  "**/test_*.*",
+  "**/spec_*.*",
+]
+
+[smells]
+mode = "comment"
+
+[[source]]
+name = "default"
+default = true
+
+
+[[plugin]]
+name = "checkov"
+
+[[plugin]]
+name = "markdownlint"
+mode = "comment"
+
+[[plugin]]
+name = "prettier"
+
+[[plugin]]
+name = "ripgrep"
+mode = "comment"
+
+[[plugin]]
+name = "rubocop"
+
+[[plugin]]
+name = "trivy"
+drivers = [
+  "config",
+]
+
+[[plugin]]
+name = "trufflehog"
+
+[[plugin]]
+name = "yamllint"
+
+[coverage]
+lcov_path = "coverage/lcov/gemplate.lcov"

.rubocop.yml

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+AllCops:
+  TargetRubyVersion: 2.7
+  NewCops: enable
+  Exclude:
+    - "vendor/**/*"
+    - "tmp/**/*"
+    - "coverage/**/*"
+
+# Disable some common rules for gem development
+Layout/LineLength:
+  Max: 120
+
+Style/Documentation:
+  Enabled: false
+
+Metrics/MethodLength:
+  Max: 20
+  Exclude:
+    - lib/gemplate/generator.rb  # Generator methods legitimately need to be longer
+    - spec/**/*  # Test methods can be longer for readability
+
+Metrics/ClassLength:
+  Max: 250
+  Exclude:
+    - lib/gemplate/generator.rb  # Generator class is complex by nature
+
+Metrics/AbcSize:
+  Max: 25
+  Exclude:
+    - lib/gemplate/generator.rb
+
+Metrics/CyclomaticComplexity:
+  Max: 12
+  Exclude:
+    - lib/gemplate/generator.rb
+
+Metrics/PerceivedComplexity:
+  Max: 12
+  Exclude:
+    - lib/gemplate/generator.rb
+
+Metrics/BlockLength:
+  Exclude:
+    - spec/**/*
+    - '*.gemspec'
+
+Style/StringLiterals:
+  EnforcedStyle: single_quotes
+
+Layout/TrailingEmptyLines:
+  EnforcedStyle: final_newline