Hide project/services panels when not in a docker-compose project directory

[Copilot]

v0.25's multi-project discovery caused the Projects and Services panels to always appear, even when launched outside a compose project. Containers were also filtered to the first discovered project, making other running containers invisible.

Changes

• project_panel.go: Added Hide returning !InDockerComposeProject — Projects panel only appears when inside a compose directory.

• services_panel.go: Simplified Hide from !InDockerComposeProject && len(services) == 0 to !InDockerComposeProject. The old check caused the panel to appear whenever other compose containers were running on the system.

• containers_panel.go: Project-based filtering now only applies when InDockerComposeProject is true — outside a compose project, all containers are shown in a flat list regardless of their compose project label.

• arrangement.go: The compact-size treatment (Size: 3) for the first side panel was unconditional. Now it only applies when sideWindowNames[0] == "project", preventing the Containers panel from being squashed to 3 lines when the Projects panel is hidden.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Disable forced Project view</issue_title>
<issue_description>Is your feature request related to a problem? Please describe.
Before v25 if I run lazydocker in a "non project" folder I was able to see all running containers on the system in the container[3] view, regardless if they belong to a docker-compose project or not and the Services [2] panel was hidden. If i run it from inside a docker-compose project folder I would see the containers of the compose project in the Services[2] Panel and all others in the containers[3] panel.

Now I am no longer able to see all containers on the system at once, no matter in which folder I run lazydocker.
Also now the "Services" panel is always visible which adds yet another panel to the already overcrowded left side (see also #513)

Describe the solution you'd like
A way to disable the "Project" functionality if lazydocker is not run inside a project folder and have all containers be visible in a flat list in panel [3] like it was possible in v24. As shown in the Github Project's own readme/demo https://github.com/jesseduffield/lazydocker/blob/master/docs/resources/demo3.gif

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Disable forced Project view #775

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