docs: add comprehensive documentation for operations

This commit introduces a complete set of documentation files
covering various aspects of the project, including environment
setup, quality checks, command references, and architecture.
The documentation is structured to assist developers and
contributors in understanding the project's configuration,
workflow, and best practices.

Additionally, translations for Simplified and Traditional
Chinese have been added to ensure accessibility for a wider
audience. This enhances the overall usability and
maintainability of the project.

Signed-off-by: Bertrand Yuan <github@bertyuan.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/Documentation/source/operations/quality.rst b/Documentation/source/operations/quality.rst
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+Quality
+=======
+
+Tooling
+-------
+
+.. list-table::
+   :header-rows: 1
+   :widths: 20 54
+
+   * - Tool
+     - Role
+   * - Vitest
+     - Unit and component tests.
+   * - Testing Library
+     - DOM-oriented component assertions.
+   * - Biome
+     - Linting and formatting checks.
+   * - ``scripts/lint.mts``
+     - Project-specific content and link validation.
+   * - TypeScript
+     - Static type checking through project build and editor tooling.
+
+Common Checks
+-------------
+
+.. code-block:: bash
+
+   pnpm lint
+   pnpm check
+   pnpm test
+   pnpm build
+
+Testing Guidance
+----------------
+
+Add tests when a change affects:
+
+* shared UI components;
+* route-visible behavior;
+* metadata generation;
+* validation logic;
+* content transformation;
+* pagination;
+* authentication or comment policy boundaries.
+
+Keep tests focused on observable behavior. Avoid locking tests to incidental
+implementation details unless the implementation itself is the contract.
+
+CI Direction
+------------
+
+A complete CI gate should run lint, tests, type-sensitive build checks, and
+documentation build checks. If a command requires external secrets, provide a
+mocked or validation-skipped CI mode rather than weakening production
+validation.