docs: add horizontal rules to install instructions

Author: CyanVoxel

docs/install.md

@@ -12,6 +12,8 @@ TagStudio has builds for **Windows**, **macOS** _(Apple Silicon & Intel)_, and *
 !!! info "For macOS Users"
     On macOS, you may be met with a message saying "**"TagStudio" can't be opened because Apple cannot check it for malicious software.**" If you encounter this, then you'll need to go to the "Settings" app, navigate to "Privacy & Security", and scroll down to a section that says "**"TagStudio" was blocked from use because it is not from an identified developer.**" Click the "Open Anyway" button to allow TagStudio to run. You should only have to do this once after downloading the application.
 
+---
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 ### Package Managers
 
 <!-- prettier-ignore -->
@@ -46,6 +48,8 @@ pip install .
 
 TagStudio can now be launched via the `tagstudio` command in your terminal.
 
+---
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 ### Linux
 
 Some external dependencies are required for TagStudio to execute. Below is a table of known packages that will be necessary.
@@ -197,6 +201,8 @@ Finally, `inputs` can be used in a module to add the package to your packages li
 
 Don't forget to rebuild!
 
+---
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 ## Creating a Development Environment
 
 If you wish to develop for TagStudio, you'll need to create a development environment by installing the required dependencies. You have a number of options depending on your level of experience and familiarly with existing Python toolchains.
@@ -219,6 +225,8 @@ If you already have Python installed on your system, you can check the version b
 python --version
 ```
 
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 #### Installing with pyenv
 
 If you choose to install Python using pyenv, please refer to the following instructions:
@@ -227,6 +235,8 @@ If you choose to install Python using pyenv, please refer to the following instr
 2. Install the appropriate Python version with pyenv by running `pyenv install 3.12` (This will **not** mess with your existing Python installation).
 3. Navigate to the repository root folder in your terminal and run `pyenv local 3.12`. You could alternatively use `pyenv shell 3.12` or `pyenv global 3.12` instead to set the Python version for the current terminal session or the entire system respectively, however using `local` is recommended.
 
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 ### Installing Dependencies
 
 To install the required dependencies, you can use a dependency manager such as [uv](https://docs.astral.sh/uv) or [Poetry 2.0](https://python-poetry.org). Alternatively you can create a virtual environment and manually install the dependencies yourself.
@@ -239,6 +249,8 @@ If using [uv](https://docs.astral.sh/uv), you can install the dependencies for T
 uv pip install -e .[dev]
 ```
 
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 #### Installing with Poetry
 
 If using [Poetry](https://python-poetry.org), you can install the dependencies for TagStudio with the following command:
@@ -247,6 +259,8 @@ If using [Poetry](https://python-poetry.org), you can install the dependencies f
 poetry install --with dev
 ```
 
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 #### Installing with Nix
 
 If using [Nix](https://nixos.org/), there is a development environment already provided in the [flake](https://wiki.nixos.org/wiki/Flakes) that is accessible with the following command:
@@ -272,6 +286,8 @@ cat .envrc # You are checking them, right?
 direnv allow
 ```
 
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 #### Manual Installation
 
 If you choose to manually set up a virtual environment and install dependencies instead of using a dependency manager, please refer to the following instructions: