Adds antispam plugin information

[YasinY]

Advanced spam filtering plugin for RuneLite that blocks begging, advertisements, scams, and other unwanted chat messages in Old School RuneScape.

Read the https://github.com/YasinY/antispam README for a very detailed explanation in accordance to use-cases etc.

[runelite-github-app[bot]]

New plugin antispam: https://github.com/YasinY/antispam/tree/dbc928e8db48394b47f3a0b0c05d4cea28e424d7

[runelite-github-app[bot]]

This plugin requires a review from a Plugin Hub maintainer. The reviewer will request any additional changes if needed.

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Internal use only: Reviewer details Maintainer details

[riktenx]

• Your build.gradle has a ton of junk in it that isn't really correct or needed at all, I assume from whatever LLM you used to make this. Plugin projects should generally follow the example template. Just delete your build.gradle and start over from https://github.com/runelite/example-plugin/blob/master/build.gradle. You're free to add the test stuff back but nothing else.
• Your "filter stats" mapping of keywords -> count is basically a slow memory leak since the number of keywords is unbounded, just remove this
• I'm fairly certain your processedMessages is also leaking for the same reason, remove that as well

[riktenx]

Also your readme installation instructions are just wrong, you can't install a plugin by downloading a jar and putting it in the plugins file. Do not instruct people to download jars and put them in places.

[riktenx]

Closing because the above remains unaddressed. If you fix this in the future you can submit a new PR.