Add 3 utility packages to Espanso Hub: escape, repeat, snipbank

[dicksonlaw583]

I would like to add 3 packages to the Espanso Hub:

• Escape: Encode and decode escape sequences in JSON/backslash, XML, URL encoding, and regular expression notation
• Repeat: Type pieces of text on repeat
• Snipbank: A snippet manager that supports collecting new snippets using ,,.. and removing them ..,,. Form creation is also supported. It can be used as a dynamic clipboard.

[smeech]

Three packages, heavily dependent on a multitude of Python helper scripts. Passes the automated checks.
Those in escape and repeat are quite straightforward, converting and returning text in different formats.
The scripts in snipbank are more complex and rely on the Espanso environment to supply user-entered data as inputs. No apparently malicious or insecure code in this context.

I was a little concerned that hub-frontend might choke on the .gitignore file outside the versioned package folders, and prevent the packages appearing there. DeepWiki assures me it won't. 🤞

I'm inclined to merge, but as it's more complex than most I'd welcome another pair of eyes on it first.

[smeech]

I would still like someone to look at this (especially the snipbank package which creates and modifies files in the filesystem) and comment before I merge. I have forked the author's repo and removed all but their contributions so that DeepWiki can analyse it. It raises some concerns about general vulnerability although the packages appear safe, with risks depending on user-inputs.

[joh6nn]

I wouldn't claim to be more than an intermediate level python dev, and as such I can't make any guarantees here. That said: this looks cleaner and better documented than some of the code I've written. Nothing here immediately jumps out at me as either dangerous or malicious.

[smeech]

Thank you. I'm sure there's nothing malicious. Just wanted to check it's safe enough for the Espanso "brand".