docs: 'How ESLint is Maintained' page (#16961)

* docs: How eslint is maintained page

* implement reviewer feedback

* remove trailing space

* remove todo

* Apply suggestions from code review

Co-authored-by: Nitin Kumar <snitin315@gmail.com>
Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* Apply suggestions from code review

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update docs/src/maintain/overview.md

Co-authored-by: Ben Perlmutter <57849986+bpmutter@users.noreply.github.com>

---------

Co-authored-by: Nitin Kumar <snitin315@gmail.com>
Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>
Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

docs/src/maintain/index.md

@@ -9,6 +9,10 @@ eleventyNavigation:
 
 This guide is intended for those who work as part of the ESLint project team.
 
+## [How ESLint is Maintained](overview)
+
+Explains how ESLint is maintained, including information about team, governance, and funding.
+
 ## [Manage Issues](manage-issues)
 
 Describes how to deal with issues when they're opened, how to interact with users who open issues, and how to close issues effectively.

docs/src/maintain/manage-issues.md

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     key: manage issues
     parent: maintain eslint
     title: Manage Issues
-    order: 1
+    order: 2
 
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docs/src/maintain/manage-releases.md

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     key: manage releases
     parent: maintain eslint
     title: Manage Releases
-    order: 3
+    order: 4
 
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docs/src/maintain/overview.md

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+---
+title: How ESLint is Maintained
+eleventyNavigation:
+    key: how eslint is maintained
+    parent: maintain eslint
+    title: How ESLint is Maintained
+    order: 1
+
+---
+
+This page explains the different roles and structures involved in maintaining ESLint.
+
+## The ESLint Team
+
+The ESLint team works together to develop and maintain ESLint. To learn more about the different roles on the ESLint team, refer to [Governance](../contribute/governance). To see the current team members, refer to [Team](/team/).
+
+## Organization Structure
+
+ESLint is part of the [OpenJS Foundation](https://openjsf.org/), a nonprofit organization that supports open-source projects and communities in the JavaScript ecosystem.
+
+The OpenJS Foundation provides legal infrastructure for JavaScript projects like ESLint. It is the owner of the intellectual property related to ESLint, including copyrights and trademarks, and ensures the independence of the project. They are also a resource for ESLint if we need legal advice or representation.
+
+The OpenJS Foundation does not participate in the day-to-day functioning of ESLint.
+
+## Funding
+
+ESLint is funded through several sources, including:
+
+* [**Open Collective**](https://opencollective.com/eslint): A platform for financing open source projects.
+* [**GitHub Sponsors**](https://github.com/sponsors/eslint): A platform for funding open source projects associated with Github.
+* [**Tidelift**](https://tidelift.com/subscription/pkg/npm-eslint): A subscription service that lets enterprises manage and fund the open source projects that their organization uses.
+* [**Carbon Ads**](https://www.carbonads.net/open-source): Developer-centric advertising provider used on [eslint.org](https://eslint.org/).
+* [**Stackaid.us**](https://simulation.stackaid.us/github/eslint/eslint): Tool that developers can use to allocate funding to the open source projects they use.
+
+ESLint uses this funding for the following purposes:
+
+* Pay team members and contractors
+* Fund projects
+* Pay for services that keep ESLint running (web hosting, software subscriptions, etc.)
+* Provide financial support to our dependencies and ecosystem
+
+## Joining the Maintainer Team
+
+ESLint is an open-source project, and anyone can contribute to the project. If you're interested in becoming part of the maintainer team, stop by our [Discord](https://eslint.org/chat) and introduce yourself.

docs/src/maintain/review-pull-requests.md

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     key: review pull requests
     parent: maintain eslint
     title: Review Pull Requests
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+    order: 3
 
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docs/src/maintain/working-groups.md

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     key: working groups
     parent: maintain eslint
     title: Working Groups
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+    order: 5
 ---
 
 The ESLint [Technical Steering Committee](../contribute/governance#technical-steering-committee-tsc) (TSC) may form working groups to focus on a specific area of the project.