DOC: Add 'About MNE-Python' section to website

- Add new top-level 'About' section to the documentation website
- Add new overview.rst page describing MNE-Python, its mission,
  and governance structure (closes #13575)
- Move governance.rst from Development to About section
- Move whats_new.rst (changelog) from Development to About section
- Move cite.rst and cited.rst from Documentation to About section
- Move bibliography.rst from orphan to About section

Author: Omesh37

doc/bibliography.rst doc/about/bibliography.rstdoc/bibliography.rst renamed to doc/about/bibliography.rst

@@ -0,0 +1,15 @@
+.. _about:
+
+About MNE-Python
+================
+
+
+.. toctree::
+   :hidden:
+
+   overview
+   governance
+   whats_new
+   bibliography
+   cite
+   cited

doc/documentation/cite.rst doc/about/cite.rstdoc/documentation/cite.rst renamed to doc/about/cite.rst

@@ -0,0 +1,43 @@
+.. _overview:
+
+========
+Overview
+========
+
+About MNE-Python
+================
+
+MNE-Python is software for analysis and visualization of human
+neuroscience data. The core package emphasizes EEG and MEG modalities,
+but extension packages provide enhanced support for
+:doc:`fNIRS <mne-nirs:index>` and :doc:`EMG <mne-python:index>`.
+Other extensions provide advanced algorithms for
+:doc:`connectivity analysis <mne-connectivity:index>`,
+:doc:`compatibility with BIDS <mne-bids:index>`,
+`integration with LSL for real-time data streams <https://mne.tools/mne-lsl>`__,
+:doc:`denoising <mne-noise-reduction:index>`,
+and :doc:`many other functionalities <mne-tools:index>`.
+All software in the `MNE-tools organization <https://github.com/mne-tools>`__
+is open-source and permissively licensed.
+
+Mission
+=======
+
+The mission of the MNE-Tools organization is to support neuroscience
+research and its application to clinical and commercial uses. This
+includes our software tools, but also many forms of user support and
+education: :ref:`tutorial resources <tutorials>`,
+a `Q&A forum <https://mne.discourse.group>`__,
+:ref:`office hours <contributing>`,
+:ref:`workshops <contributing>`,
+and :ref:`hackathons <contributing>`.
+
+Governance
+==========
+
+The MNE project is led by a :ref:`steering council <governance>`,
+with guidance from an :ref:`advisory board <governance>`.
+Software development is overseen by the :ref:`maintainer team <governance>`,
+with :ref:`many contributions from our community of users <contributing>`.
+There are also a few :ref:`working groups <governance>`
+focused on particular topics.

doc/documentation/cited.rst doc/about/cited.rstdoc/documentation/cited.rst renamed to doc/about/cited.rst

@@ -0,0 +1,3 @@
+- Add new "About MNE-Python" top-level section to the website, consolidating
+  governance, changelog, bibliography, citation pages, and a new overview
+  page (:gh:`13575`). By :ghuser:`Omesh37`.

doc/development/governance.rst doc/about/governance.rstdoc/development/governance.rst renamed to doc/about/governance.rst

@@ -33,6 +33,4 @@ experience.
    :hidden:
 
    contributing
-   whats_new
    roadmap
-   governance

doc/about/index.rst

@@ -57,7 +57,5 @@ Documentation for the related C and MATLAB tools are available here:
    Command-line tools<../generated/commands>
    ../help/migrating
    cookbook
-   cite
-   cited
 
 .. include:: ../links.inc