[shyamenk]

What changed

• Replace syntect's default syntax set with the two-face bundle (the extra syntaxes bat ships). It uses the same syntect 5.2 / onig backend, so no new regex engine.
• Add aliases for tf, tfvars, hcl, terraform, make/makefile, env/ini/conf, and groovy/jenkinsfile.
• Add a syntax_key helper so extensionless files (Dockerfile, Dockerfile.*, Makefile, Jenkinsfile, .env) are highlighted when opened and are accepted by the file picker when their file name (e.g. Dockerfile) is listed in extras.
• Kubernetes/Ansible/Helm: manifests, values.yaml and playbooks are YAML and were already covered. Added Jinja2 (j2), Helm templates (tpl, gotmpl, highlighted as Jinja2 since no Go-template grammar ships), Rego, Protocol Buffers, systemd units and Ansible inventory (as INI), nginx conf, and Tiltfile/Vagrantfile.
• README: note the DevOps formats in the Extra Files section.

Why

Terraform/HCL, Dockerfile and Makefile files opened as plain Markdown with no highlighting (.tf also got its straight quotes converted to curly ones), because the default syntect set has no HCL grammar and Leaf only looked at file extensions.

How it was tested

• cargo test: 983 passed, including new resolve_syntax_supports_devops_file_types and syntax_key_maps_extensionless_devops_files. The shared test syntax set now uses two-face too.
• cargo clippy --all-targets --all-features -- -D warnings and cargo fmt --check: clean.
• leaf --inline ansi on sample files, counting distinct colors before/after: main.tf 1 → 6, Dockerfile 1 → 4, Makefile 1 → 4, YAML unchanged.
• Ran the real TUI in tmux: the browser picker (--picker) and fuzzy picker (--fuzzy) list Dockerfile/Makefile when named in extras, and leaf Dockerfile opens highlighted. New test file_picker_lists_extensionless_devops_files_from_extras.
• Size and startup, both built from source with cargo build --release on the same machine (upstream main at 554dcea vs this branch):
  • Binary: 15,703,896 -> 16,345,840 bytes (+641,944, +4.1%).
  • Startup (leaf --inline plain README.md, 200 interleaved runs each): median 4.79 ms -> 6.58 ms (+1.79 ms), p95 5.21 ms -> 7.33 ms. The extra time is the larger syntax set being loaded at launch.