This for a few reasons:
* The summary becomes the landing page for code quality:
  https://firefox-source-docs.mozilla.org/tools/static-analysis/summary.html
* I don't think we need a full code quality category
* Closer to the source-code-doc
* All the files at the same place

Differential Revision: https://phabricator.services.mozilla.com/D61767

--HG--
rename : tools/lint/docs/coding-style/coding_style_java.rst => docs/code-quality/coding-style/coding_style_java.rst
rename : tools/lint/docs/coding-style/coding_style_other.rst => docs/code-quality/coding-style/coding_style_other.rst
rename : tools/lint/docs/coding-style/coding_style_python.rst => docs/code-quality/coding-style/coding_style_python.rst
rename : tools/lint/docs/coding-style/format_cpp_code_with_clang-format.rst => docs/code-quality/coding-style/format_cpp_code_with_clang-format.rst
rename : tools/clang-tidy/docs/summary.rst => docs/code-quality/index.rst
rename : tools/lint/docs/create.rst => docs/code-quality/lint/create.rst
rename : tools/lint/docs/index.rst => docs/code-quality/lint/index.rst
rename : tools/lint/docs/index.rst => docs/code-quality/lint/lint.rst
rename : tools/lint/docs/linters/codespell.rst => docs/code-quality/lint/linters/codespell.rst
rename : tools/lint/docs/linters/cpp-virtual-final.rst => docs/code-quality/lint/linters/cpp-virtual-final.rst
rename : tools/lint/docs/linters/eslint-plugin-mozilla.rst => docs/code-quality/lint/linters/eslint-plugin-mozilla.rst
rename : tools/lint/docs/linters/eslint-plugin-spidermonkey-js.rst => docs/code-quality/lint/linters/eslint-plugin-spidermonkey-js.rst
rename : tools/lint/docs/linters/eslint.rst => docs/code-quality/lint/linters/eslint.rst
rename : tools/lint/docs/linters/file-perm.rst => docs/code-quality/lint/linters/file-perm.rst
rename : tools/lint/docs/linters/file-whitespace.rst => docs/code-quality/lint/linters/file-whitespace.rst
rename : tools/lint/docs/linters/flake8.rst => docs/code-quality/lint/linters/flake8.rst
rename : tools/lint/docs/linters/l10n.rst => docs/code-quality/lint/linters/l10n.rst
rename : tools/lint/docs/linters/license.rst => docs/code-quality/lint/linters/license.rst
rename : tools/lint/docs/linters/lintpref.rst => docs/code-quality/lint/linters/lintpref.rst
rename : tools/lint/docs/linters/mingw-capitalization.rst => docs/code-quality/lint/linters/mingw-capitalization.rst
rename : tools/lint/docs/linters/perfdocs.rst => docs/code-quality/lint/linters/perfdocs.rst
rename : tools/lint/docs/linters/rstlinter.rst => docs/code-quality/lint/linters/rstlinter.rst
rename : tools/lint/docs/linters/rustfmt.rst => docs/code-quality/lint/linters/rustfmt.rst
rename : tools/lint/docs/usage.rst => docs/code-quality/lint/usage.rst
rename : tools/clang-tidy/docs/index.rst => docs/code-quality/static-analysis.rst
extra : moz-landing-system : lando