Add .pre-commit-config.yaml skeleton.

Includes all hooks I use, except for those I maintain. Those I'm going
to join under https://git.shore.co.il/nimrod/pre-commit-hooks and update
and imporve a bit.

.config/git/skel/.pre-commit-config.yaml

+---
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks.git
+    rev: v4.0.1
+    hooks:
+      - id: check-added-large-files
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-merge-conflict
+      - id: check-shebang-scripts-are-executable
+      - id: check-symlinks
+      - id: check-toml
+      - id: check-xml
+      - id: check-yaml
+      - id: detect-private-key
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+
+  - repo: https://github.com/codespell-project/codespell.git
+    rev: v2.1.0
+    hooks:
+      - id: codespell
+
+  - repo: https://github.com/Yelp/detect-secrets.git
+    rev: v1.1.0
+    hooks:
+      - id: detect-secrets
+
+  - repo: https://gitlab.com/devopshq/gitlab-ci-linter
+    rev: v1.0.3
+    hooks:
+      - id: gitlab-ci-linter
+        args:
+          - "--server"
+          - https://git.shore.co.il
+
+  - repo: https://github.com/amperser/proselint.git
+    rev: 0.10.2
+    hooks:
+      - id: proselint
+        types: [plain-text]
+        exclude: LICENSE
+
+  - repo: https://github.com/adrienverge/yamllint.git
+    rev: v1.26.3
+    hooks:
+      - id: yamllint
+
+  - repo: https://github.com/executablebooks/mdformat.git
+    rev: 0.7.9
+    hooks:
+      - id: mdformat
+
+  - repo: https://github.com/ambv/black.git
+    rev: 21.8b0
+    hooks:
+      - id: black
+        args:
+          - |
+              --line-length=79
+
+  - repo: https://github.com/Lucas-C/pre-commit-hooks-markup.git
+    rev: v1.0.1
+    hooks:
+      - id: rst-linter
+
+  - repo: https://github.com/myint/rstcheck.git
+    rev: master
+    hooks:
+      - id: rstcheck
+
+  - repo: https://github.com/PyCQA/prospector.git
+    rev: 1.5.1b0
+    hooks:
+      - id: prospector
+        args:
+          - |-
+            --max-line-length=79
+          - |-
+            --with-tool=pyroma
+          - |-
+            --with-tool=bandit
+          - |-
+            --without-tool=pep257
+          - |-
+            --doc-warnings
+          - |-
+            --test-warnings
+          - |-
+            --full-pep8
+          - |-
+            --strictness=high
+          - |-
+            --no-autodetect
+        additional_dependencies:
+          - bandit
+          - pyroma
+
+  - repo: https://gitlab.com/pycqa/flake8.git
+    rev: 3.9.2
+    hooks:
+      - id: flake8
+        args:
+          - |-
+            --doctests
+        additional_dependencies:
+          - flake8-bugbear
+
+  - repo: https://github.com/mgedmin/check-manifest.git
+    rev: '0.46'
+    hooks:
+      - id: check-manifest
+
+  - repo: https://github.com/pre-commit/pre-commit.git
+    rev: v2.15.0
+    hooks:
+      - id: validate_manifest
+
+  - repo: https://git.shore.co.il/nimrod/shell-pre-commit.git
+    rev: v0.6.0
+    hooks:
+      - id: shell-lint
+
+  - repo: https://github.com/shellcheck-py/shellcheck-py.git
+    rev: v0.7.2.1
+    hooks:
+      - id: shellcheck
+
+  - repo: https://git.shore.co.il/nimrod/docker-pre-commit.git
+    rev: v0.3.0
+    hooks:
+      - id: docker-compose
+
+  - repo: https://github.com/ansible/ansible-lint.git
+    rev: v5.1.3
+    hooks:
+      - id: ansible-lint
+
+  - repo: https://github.com/AleksaC/hadolint-py.git
+    rev: v2.1.0
+    hooks:
+      - id: hadolint