docs: Create globs.md (#1882)

docs/docs/globs.md

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+---
+layout: default
+title: Globs
+categories: docs
+# parent: Docs
+nav_order: 4
+---
+
+# Globs
+
+Globs are used extensively by CSpell to determine which files to check and what settings to apply.
+
+Here are some of the places globs are used:
+
+| Location               | Mode       | Note                                                                                                                                                            |
+| ---------------------- | ---------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `files[]`              | **strict** | The glob patterns used to search for files to spell check.                                                                                                      |
+| `ignorePaths[]`        | **loose**  | Glob patterns used to exclude files and directories from being checked. `!` are only partially supported due to an issue with the Glob library[<sup>1</sup>][1] |
+| `overrides[].filename` | **loose**  | Used to apply configuration settings to file whose path matches the glob                                                                                        |
+
+[1]: https://github.com/isaacs/node-glob/issues/409 'Glob - Does not match for negative ignore · Issue #409'
+
+## Mode - Strict
+
+Strict mode is used to explicitly select files to be checked. It gives more nuanced control over the file search process.
+
+Examples:
+
+| Glob                | Meaning                                                                                   |
+| ------------------- | ----------------------------------------------------------------------------------------- |
+| `*.md`              | Only check the Markdown files in the current directory. It will not scan subdirectories.  |
+| `**/*.md`           | Scan all directories (except _hidden_ ones starting with `.`) looking for markdown files. |
+| `**/{*,.*}/**/*.md` | Scan all directories include _hidden_ ones looking for markdown files.                    |
+| `src/**`            | Scan the `src` directory looking for all _non-hidden_ files.                              |
+
+## Mode - Loose
+
+Loose mode is used to match files that have been found. It is designed to emulate `.gitignore` rules closely.
+By default, loose mode matches hidden files and directories.
+
+Examples:
+
+| Glob               | Meaning                                                                                                                   |
+| ------------------ | ------------------------------------------------------------------------------------------------------------------------- |
+| `*.md`             | Will match against any path containing `*.md`                                                                             |
+| `node_modules`     | Will match against any path containing `node_modules`                                                                     |
+| `/node_modules`    | Matches against `./node_modules` and all contained files. It will not match nested paths like: `./package/node_modules/*` |
+| `/node_modules/`   | Matches the `./node_modules` directory and any files it contains.                                                         |
+| `/node_modules/**` | Same as `/node_modules/`                                                                                                  |
+| `test`             | Matches any directory or file called `test`. Equivalent to using both `**/test` and `**/test/**`.                         |
+| `**/test/**`       | Similar to `test`, but only matches paths contained in a `test` directory.                                                |