feat: add appendFile, readNDJSON, and resolveParentPaths to fs namespace

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
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  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
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    status: na
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    status: na
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    status: na
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  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

lib/node_modules/@stdlib/fs/lib/index.js

@@ -36,6 +36,15 @@ var setReadOnly = require( '@stdlib/utils/define-read-only-property' );
 */
 var fs = {};
 
+/**
+* @name appendFile
+* @memberof fs
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/fs/append-file}
+*/
+setReadOnly( fs, 'appendFile', require( '@stdlib/fs/append-file' ) );
+
 /**
 * @name close
 * @memberof fs
@@ -99,6 +108,15 @@ setReadOnly( fs, 'readFileList', require( '@stdlib/fs/read-file-list' ) );
 */
 setReadOnly( fs, 'readJSON', require( '@stdlib/fs/read-json' ) );
 
+/**
+* @name readNDJSON
+* @memberof fs
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/fs/read-ndjson}
+*/
+setReadOnly( fs, 'readNDJSON', require( '@stdlib/fs/read-ndjson' ) );
+
 /**
 * @name readWASM
 * @memberof fs
@@ -135,6 +153,15 @@ setReadOnly( fs, 'resolveParentPath', require( '@stdlib/fs/resolve-parent-path'
 */
 setReadOnly( fs, 'resolveParentPathBy', require( '@stdlib/fs/resolve-parent-path-by' ) );
 
+/**
+* @name resolveParentPaths
+* @memberof fs
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/fs/resolve-parent-paths}
+*/
+setReadOnly( fs, 'resolveParentPaths', require( '@stdlib/fs/resolve-parent-paths' ) );
+
 /**
 * @name unlink
 * @memberof fs