Docs Party 2024 (#15876)

Co-authored-by: Raunak Raj <nkray21111983@gmail.com>
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Co-authored-by: Bennet <bennet@zed.dev>
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Co-authored-by: Marshall <marshall@zed.dev>
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Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>

docs/src/extensions/installing-extensions.md

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+# Installing Extensions
+
+You can search for extensions by launching the Zed Extension Gallery by pressing `cmd-shift-x` (MacOS) or `ctrl-shift-x` (Linux), opening the command palette and selecting `zed: extensions` or by selecting "Zed > Extensions" from the menu bar.
+
+Here you can view the extensions that you currently have installed or search and install new ones.
+
+## Installation Location
+
+- On macOS, extensions are installed in `~/Library/Application Support/Zed/extensions`.
+- On Linux, they are installed in either `$XDG_DATA_HOME/zed/extensions` or `~/.local/share/zed/extensions`.
+
+This directory contains two subdirectories:
+
+- `installed`, which contains the source code for each extension.
+- `work` which contains files created by the extension itself, such as downloaded language servers.