Standardize bang names based on new naming spec

[FaFre]

Currently, many bang names do not follow a specific pattern, and their names often fail to describe their actual behavior. This makes discovering the correct bang difficult when searching by name. Since I run a search on the names, this lead to a lot of false positives and confusion.

For example, the following bang applies a Spanish language tag, but you wouldn't know it just from looking at the name:

{
    "s": "duckduckgo",
    "d": "duckduckgo.com",
    "t": "ddg-es",
    "u": "https://duckduckgo.com/?q={{{s}}}&kl=xl-es&kad=es_ES&ia=about",
    "c": "Online Services",
    "sc": "Search (non-US)"
  }

To fix this, I created a naming specification to ensure bang names accurately reflect their function (such as including language or region tags): https://github.com/FaFre/bangs/blob/main/WEBSITE_NAMING_SPEC.md

I used an LLM to apply this spec across the repository in small batches. Therefore all of the renames are done by LLM and are not manually reviewed.

I am not sure if a PR of this size and impact is something that is welcomed to merge, so please let me know if there is interest. I could do this since I had a lot of tokens to burn. Another run (after maybe changes to the spec) will be not possible from my side.

Edit: I forgot to mention the PR also includes some removals of duplicate or nearly identical bangs...