pyln-client: Adding disableoffer, enableoffer, fetchinvoice, listoffers and offer commands

[21M4TW]

Important

25.02 FREEZE JANUARY 31ST: Non-bugfix PRs not ready by this date will wait for 25.05.

Checklist

Before submitting the PR, ensure the following tasks are completed. If an item is not applicable to your PR, please mark it as checked:

• The changelog has been updated in the relevant commit(s) according to the guidelines.
• Tests have been added or modified to reflect the changes.
• Documentation has been reviewed and updated as needed.
• Related issues have been listed and linked, including any that this PR closes.

[vincenzopalazzo]

ACK f1c4467

The only missing thing in here is to remove the merge commit

Re-based the PR on Master.

[ShahanaFarooqui]

@21M4TW Thanks for opening the PR! Just two quick suggestions for future contributions:

• Please use git rebase instead of merge for your commits.
• The preferred place for changelog entries is in the commit/PR description. You can find guidelines on choosing the right format here.