feat(build): request new ORG-level secrets

[paullatzelsperger]

What this PR changes/adds

This PR adds two new org-level secrets, the GITHUB_BOT_TOKEN and the GITHUB_BOT_USER. Those secrets already exist on our Jenkins instance (named BOTTOKEN and BOT), so we would simply like to migrate them to GitHub.

Why it does that

We would like to be able to invoke workflows across repos, so e.g. our Release repo invokes a test workflow in the Connector repo. For that we need a PAT on the ORG level.

Further notes

• I was unable to deduce the exact path in the secrets manager, so I put ??????? there. Please advise, and I will amend my PR.
• AFAIK, it is possible to use a PAT instead of a user/password combo. So theoretically, a GITHUB_BOT_TOKEN (containing the bot's PAT) should be sufficient. I have no preference either way.
• unrelated: I added a .gitignore file

Linked Issue(s)

Closes # <-- insert Issue number if one exists

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[github-actions]

Diff for 1f3bc65:

Printing local diff for configuration at '/home/runner/work/.eclipsefdn/.eclipsefdn/otterdog-configs/otterdog.json'

Actions are indicated with the following symbols:
+   create
!   modify
!   forced update
-   delete

Organization eclipse-edc[id=eclipse-edc]
  there have been 58 validation infos, enable verbose output with '-v' to to display them.

+   add org_secret[name="ORG_GITHUB_BOT_TOKEN"] {
+     name                                                     = "ORG_GITHUB_BOT_TOKEN"
+     selected_repositories                                    = []
+     visibility                                               = "public"
+   }

+   add org_secret[name="ORG_GITHUB_BOT_USER"] {
+     name                                                     = "ORG_GITHUB_BOT_USER"
+     selected_repositories                                    = []
+     visibility                                               = "public"
+   }
  
  Plan: 2 to add, 0 to change, 0 to delete.

Showing diff to a canonical version of the configuration at '/home/runner/work/.eclipsefdn/.eclipsefdn/otterdog-configs/otterdog.json'

Organization eclipse-edc[id=eclipse-edc]

[netomi]

secrets have been created.