Docs: Add guide for identifying open-source projects in sustainability and climate

[kolasaniv1996]

This PR adds a new document to the directory. This guide provides a methodology for identifying relevant open-source projects in the areas of sustainability and climate, building upon the existing efforts of the Open Sustainable Technology initiative. It addresses issue #1076.

[EndlessRecess]

This is great! It's really concise and kinda short and easy to follow.

My only feedback is that points 3. and 4. regarding searching other and existing databases. I think thats important but it doesnt' really state what the intention of those searches are, I think to validate and enrich our documentation of the project.
Though it kind of implies the project is required to turn up in those searches, which I'm not sure, it might be useful outside of academia or popular datasets.
Just a thought.
C

[Ly0n]

@kolasaniv1996 Well done! Thanks for this great PR.

My only feedback is that points 3. and 4. regarding searching other and existing databases. I think thats important but it doesnt' really state what the intention of those searches are, I think to validate and enrich our documentation of the project.
Though it kind of implies the project is required to turn up in those searches, which I'm not sure, it might be useful outside of academia or popular datasets.

@EndlessRecess Agreed! What should be linked here are the organisations and their Git namespaces that we have identified so far. One way to find new projects is to look at organisations and networks that have already created similar projects: https://docs.getgrist.com/doc/gSscJkc5Rb1Rw45gh1o1Yc/p/4

Here some further improvements:

1. We need some prompts that suggest how to use LLM to search for new projects. Here one example. This is one of the best ways to find new projects:
   https://chatgpt.com/share/6849a151-b390-8004-8514-b69d69e184dd

2. You add to the unfiltered keywords. Here another improved version of keywords. Sorry the keywords in the OSTA repo were not update and based on a very early development:
   https://github.com/protontypes/osta/blob/main/ost_keywords.txt

[Ly0n]

@kolasaniv1996 Do you like to improve this or should we just merge this PR and further improve this in another PR?
We also have to discuss how to link it.

One thing that needs to be fixed with the current PR is the keyword.txt file. It should be linked from here and not be part of this repo: https://raw.githubusercontent.com/protontypes/osta/refs/heads/main/ost_keywords.txt

[Ly0n]

Do you like to improve this or should we just merge this PR and further improve this in another PR?
We also have to discuss how to link it.
@kolasaniv1996 Any feedback on this?