Convert all files to LF file ending

[MartinHruza]

Hi again, since my previous (first!) pull request was appreciated I prepared another, more radical, one.

LF is the defacto standard since it's used by Mac and Linux and Windows are mostly fine with it (batch files may be the only exception where LF endings cause troubles). Until this commit most of the files in this repo used a LF line endings anyway, the only exception were *.ino files which mostly used CRLF with couple of lines with LF. These mixed line endings cause troubles to those using VSCode since it doesn't support it (microsoft/vscode#127) so it's impossible to save a changed file without normalizing its line endings (and making the commit much bigger). This commit also introduces .gitattribute and .editorconfig files which will ensure correct formating in the future (strangely Arduino IDE doesn't support the latter one arduino/Arduino#8804).

I'm aware that this commit will make using of git blame and exploring of the project history a bit more difficult but it's better to bite the bullet now than later. Also I didn't send this pull request just to make the repo nice and tidy but to prepare the surface for more pull requests I have in the queue.

Here's a nice blog post about git and line edings if you want to learn more: https://www.aleksandrhovhannisyan.com/blog/crlf-vs-lf-normalizing-line-endings-in-git/

Thanks!

[Zer0-bit]

Hmm... are you sure it's not smth going on on your end ? I just checked and all line endings are LF on my end from what i see.

[MartinHruza]

D'oh.. my bad, sorry. Both *.ino files really use CRLF. They don't use mixed lined endings, I misinterpreted the output of git diff and that's where the confusion started.
It would be nice still to unifi the line endings across all files (see bellow) but since the line endings in ino files are not mixed, the need to merge this is a bit lower.

# ~/gaggiuino2$ git ls-files --eol
i/lf    w/lf    attr/                 	.github/ISSUE_TEMPLATE/bug_report.md
i/lf    w/lf    attr/                 	.github/ISSUE_TEMPLATE/custom.md
i/lf    w/lf    attr/                 	.github/ISSUE_TEMPLATE/feature_request.md
i/lf    w/lf    attr/                 	.github/workflows/compile-sketch.yml
i/lf    w/lf    attr/                 	.gitignore
i/lf    w/lf    attr/                 	LICENSE
i/lf    w/lf    attr/                 	README.md
i/crlf  w/crlf  attr/                 	gaggiuino.ino
i/-text w/-text attr/                 	images/GAGGIUINO_ICON_transp.png
i/-text w/-text attr/                 	images/GAGGIUINO_ICON_white.png
i/-text w/-text attr/                 	images/GAGGIUINO_LOGO_White.png
i/-text w/-text attr/                 	images/GAGGIUINO_LOGO_transp.png
i/-text w/-text attr/                 	images/Gaggiuino_ux.jpg
i/-text w/-text attr/                 	images/image1.jfif
i/-text w/-text attr/                 	lcd-hmi/nextion-lcd.HMI
i/-text w/-text attr/                 	nextion-basic-lcd.tft
i/-text w/-text attr/                 	nextion-discovery-lcd.tft
i/lf    w/lf    attr/                 	platformio.ini
i/      w/      attr/                 	platformio_src/gaggiuino.ino
i/-text w/-text attr/                 	schematics/GC-CONNECTIONS-DIAGRAM.png
i/-text w/-text attr/                 	schematics/GCP-CONNECTIONS-DIAGRAM.png
i/-text w/-text attr/                 	schematics/gc-schematics.png
i/-text w/-text attr/                 	schematics/gcp-schematics.png
i/crlf  w/crlf  attr/                 	troubleshooting/gaggiuino-debug.ino
i/lf    w/lf    attr/                 	troubleshooting/platformio.ini
i/      w/      attr/                 	troubleshooting/platformio_src/gaggiuino-debug.ino

[Zer0-bit]

I'm gonna close it as it's not smth that's applicable, thanks :)