fix: trim down Zensical, fix copyright year

{{cookiecutter.project_name}}/docs/{% if cookiecutter.docs == 'zensical' %}index.md{% endif %}

@@ -5,162 +5,3 @@ icon: lucide/rocket
 # Get started
 
 For full documentation visit [zensical.org](https://zensical.org/docs/).
-
-## Commands
-
-- [`zensical new`][new] - Create a new project
-- [`zensical serve`][serve] - Start local web server
-- [`zensical build`][build] - Build your site
-
-  [new]: https://zensical.org/docs/usage/new/
-  [serve]: https://zensical.org/docs/usage/preview/
-  [build]: https://zensical.org/docs/usage/build/
-
-## Examples
-
-### Admonitions
-
-> Go to [documentation](https://zensical.org/docs/authoring/admonitions/)
-
-!!! note
-
-    This is a **note** admonition. Use it to provide helpful information.
-
-!!! warning
-
-    This is a **warning** admonition. Be careful!
-
-### Details
-
-> Go to
-> [documentation](https://zensical.org/docs/authoring/admonitions/#collapsible-blocks)
-
-??? info "Click to expand for more info"
-
-    This content is hidden until you click to expand it.
-    Great for FAQs or long explanations.
-
-## Code Blocks
-
-> Go to [documentation](https://zensical.org/docs/authoring/code-blocks/)
-
-```python hl_lines="2" title="Code blocks"
-def greet(name):
-    print(f"Hello, {name}!")  # (1)!
-
-
-greet("Python")
-```
-
-1.  > Go to
-    > [documentation](https://zensical.org/docs/authoring/code-blocks/#code-annotations)
-
-    Code annotations allow to attach notes to lines of code.
-
-Code can also be highlighted inline: `#!python print("Hello, Python!")`.
-
-## Content tabs
-
-> Go to [documentation](https://zensical.org/docs/authoring/content-tabs/)
-
-=== "Python"
-
-    ``` python
-    print("Hello from Python!")
-    ```
-
-=== "Rust"
-
-    ``` rs
-    println!("Hello from Rust!");
-    ```
-
-## Diagrams
-
-> Go to [documentation](https://zensical.org/docs/authoring/diagrams/)
-
-```mermaid
-graph LR
-  A[Start] --> B{Error?};
-  B -->|Yes| C[Hmm...];
-  C --> D[Debug];
-  D --> B;
-  B ---->|No| E[Yay!];
-```
-
-## Footnotes
-
-> Go to [documentation](https://zensical.org/docs/authoring/footnotes/)
-
-Here's a sentence with a footnote.[^1]
-
-Hover it, to see a tooltip.
-
-[^1]: This is the footnote.
-
-## Formatting
-
-> Go to [documentation](https://zensical.org/docs/authoring/formatting/)
-
-- ==This was marked (highlight)==
-- ^^This was inserted (underline)^^
-- ~~This was deleted (strikethrough)~~
-- H~2~O
-- A^T^A
-- ++ctrl+alt+del++
-
-## Icons, Emojis
-
-> Go to [documentation](https://zensical.org/docs/authoring/icons-emojis/)
-
-- :sparkles: `:sparkles:`
-- :rocket: `:rocket:`
-- :tada: `:tada:`
-- :memo: `:memo:`
-- :eyes: `:eyes:`
-
-## Maths
-
-> Go to [documentation](https://zensical.org/docs/authoring/math/)
-
-$$
-\cos x=\sum_{k=0}^{\infty}\frac{(-1)^k}{(2k)!}x^{2k}
-$$
-
-!!! warning "Needs configuration"
-
-    Note that MathJax is included via a `script` tag on this page and is not configured in the generated default configuration to avoid including it in a pages that do not need it. See the documentation for details on how to configure it on all your pages if they are more Maths-heavy than these simple starter pages.
-
-<script id="MathJax-script" async src="https://unpkg.com/mathjax@3/es5/tex-mml-chtml.js"></script>
-<script>
-  window.MathJax = {
-    tex: {
-      inlineMath: [["\\(", "\\)"]],
-      displayMath: [["\\[", "\\]"]],
-      processEscapes: true,
-      processEnvironments: true
-    },
-    options: {
-      ignoreHtmlClass: ".*|",
-      processHtmlClass: "arithmatex"
-    }
-  };
-</script>
-
-## Task Lists
-
-> Go to
-> [documentation](https://zensical.org/docs/authoring/lists/#using-task-lists)
-
-- [x] Install Zensical
-- [x] Configure `zensical.toml`
-- [x] Write amazing documentation
-- [ ] Deploy anywhere
-
-## Tooltips
-
-> Go to [documentation](https://zensical.org/docs/authoring/tooltips/)
-
-[Hover me][example]
-
-[example]: https://example.com "I'm a tooltip!"