[doc] Document the preferred IDE unpacking procedure for Linux

[kittaakos]

It does matter what tool is used when unpacking the zipped IDE on Linux.

• The symlinks for clangd must be preserved (Failed to start language server. Bundled clangd: File too short arduino-pro-ide#213 (comment)),
• The execution rights for the shipped binaries (arduino-cli, arduino-language-server) should be kept (arduino-cli daemon issues on Arch Linux arduino-pro-ide#326 (comment)) as is.

This thread revealed it is recommended to use unzip for unarchiving the IDE.

We should document this into the main readme.

[per1234]

The appropriate place for this documentation:
https://docs.arduino.cc/software/ide-v2/tutorials/getting-started/ide-v2-downloading-and-installing#linux

I haven't noticed additional reports of this sort of issue after the ones that prompted the creation of this issue. I'm not sure why that would be. I'm sure that many Linux users have installed Arduino IDE 2.x since that time.

[kittaakos]

+1 for closing it. IDE2 pulls clangd from https://github.com/arduino/clang-static-binaries. Hence, the original issue is obsolete.

[kittaakos]

I am closing it as obsolete. As mentioned in #93 (comment), there is no particular procedure to unpack the IDE on Linux.