Auto merge of #2983 - mental32:mental/gh-1412, r=Turbo87

Add "compilers" category.

Sub categories include: transpilers, interpreters, and compilers.

I decided to follow the precedence set by `"parser-implementations"` and `"parsing"` for these categories since they felt appropriately related.

Resolves #1412

Author: bors

src/boot/categories.toml

@@ -67,6 +67,12 @@ Crates to store the results of previous computations in order to reuse \
 the results.\
 """
 
+[compilers]
+name = "Compilers"
+description = """
+Compiler implementations, including interpreters and transpilers.\
+"""
+
 [command-line-interface]
 name = "Command-line interface"
 description = """